[1] : The Collaborative International Dictionary of English v.0.48

guard \guard\, n. of. guarde, f. garde; of german origin; cf.
   ohg. wart, warto, one who watches, warta a watching, goth.
   wardja watchman. see guard, v. t.
   1913 webster
   1. one who, or that which, guards from injury, danger,
      exposure, or attack; defense; protection.
      1913 webster

            his greatness was no guard to bar heaven's shaft.
                                                  --shak.
      1913 webster

   2. a man, or body of men, stationed to protect or control a
      person or position; a watch; a sentinel.
      1913 webster

            the guard which kept the door of the king's house.
                                                  --kings xiv.
                                                  27.
      1913 webster

   3. one who has charge of a mail coach or a railway train; a
      conductor. eng.
      1913 webster

   4. any fixture or attachment designed to protect or secure
      against injury, soiling, or defacement, theft or loss; as:
      a that part of a sword hilt which protects the hand.
      b ornamental lace or hem protecting the edge of a
          garment.
      c a chain or cord for fastening a watch to one's person
          or dress.
      d a fence or rail to prevent falling from the deck of a
          vessel.
      e an extension of the deck of a vessel beyond the hull;
          esp., in side-wheel steam vessels, the framework of
          strong timbers, which curves out on each side beyond
          the paddle wheel, and protects it and the shaft
          against collision.
      f a plate of metal, beneath the stock, or the lock
          frame, of a gun or pistol, having a loop, called a
          bow, to protect the trigger.
      g bookbinding an interleaved strip at the back, as in
          a scrap book, to guard against its breaking when
          filled.
          1913 webster

   5. a posture of defense in fencing, and in bayonet and saber
      exercise.
      1913 webster

   6. an expression or admission intended to secure against
      objections or censure.
      1913 webster

            they have expressed themselves with as few guards
            and restrictions as i.                --atterbury.
      1913 webster

   7. watch; heed; care; attention; as, to keep guard.
      1913 webster

   8. zool. the fibrous sheath which covers the phragmacone of
      the belemnites.
      1913 webster

   note: guard is often used adjectively or in combination; as,
         guard boat or guardboat; guardroom or guard room; guard
         duty.
         1913 webster

   advanced guard, coast guard, etc. see under advanced,
      coast, etc.

   grand guard mil., one of the posts of the second line
      belonging to a system of advance posts of an army.
      --mahan.

   guard boat.
      a a boat appointed to row the rounds among ships of war
          in a harbor, to see that their officers keep a good
          lookout.
      b a boat used by harbor authorities to enforce the
          observance of quarantine regulations.

   guard cells bot., the bordering cells of stomates; they
      are crescent-shaped and contain chlorophyll.

   guard chamber, a guardroom.

   guard detail mil., men from a company regiment etc.,
      detailed for guard duty.

   guard duty mil., the duty of watching patrolling, etc.,
      performed by a sentinel or sentinels.

   guard lock engin., a tide lock at the mouth of a dock or
      basin.

   guard of honor mil., a guard appointed to receive or to
      accompany eminent persons.

   guard rail railroads, a rail placed on the inside of a
      main rail, on bridges, at switches, etc., as a safeguard
      against derailment.

   guard ship, a war vessel appointed to superintend the
      marine affairs in a harbor, and also, in the english
      service, to receive seamen till they can be distributed
      among their respective ships.

   life guard mil., a body of select troops attending the
      person of a prince or high officer.

   off one's guard, in a careless state; inattentive;
      unsuspicious of danger.

   on guard, serving in the capacity of a guard; doing duty as
      a guard or sentinel; watching.

   on one's guard, in a watchful state; alert; vigilant.

   to mount guard mil., to go on duty as a guard or
      sentinel.

   to run the guard, to pass the watch or sentinel without
      leave.

   syn: defense; shield; protection; safeguard; convoy; escort;
        care; attention; watch; heed.
        1913 webster
see also:
guard advanced guard coast guard advanced coast grand guard 
guard boat guard cells guard chamber guard detail guard duty 
guard lock guard of honor guard rail guard ship life guard 
off one's guard on guard on one's guard to mount guard to run the guard 

[2] : The Collaborative International Dictionary of English v.0.48

coast \coast\ k=ost, n. of. coste, f. c^ote, rib, hill,
   shore, coast, l. costa rib, side. cf. accost, v. t.,
   cutlet.
   1. the side of a thing. obs. --sir i. newton.
      1913 webster

   2. the exterior line, limit, or border of a country; frontier
      border. obs.
      1913 webster

            from the river, the river euphrates, even to the
            uttermost sea, shall your coast be.   --deut. xi.
                                                  24.
      1913 webster

   3. the seashore, or land near it.
      1913 webster

            he sees in english ships the holland coast.
                                                  --dryden.
      1913 webster

            we the arabian coast do know
            at distance, when the species blow.   --waller.
      1913 webster

   the coast is clear, the danger is over; no enemy in sight.
      --dryden. fig.: there are no obstacles. "seeing that the
      coast was clear, zelmane dismissed musidorus." --sir p.
      sidney.

   coast guard.
      a a body of men originally employed along the coast to
          prevent smuggling; now, under the control of the
          admiralty, drilled as a naval reserve. eng.
      b the force employed in life-saving stations along the
          seacoast. u. s.

   coast rat zool., a south african mammal bathyergus
      suillus, about the size of a rabbit, remarkable for its
      extensive burrows; -- called also sand mole.

   coast waiter, a customhouse officer who superintends the
      landing or shipping of goods for the coast trade. eng.
      1913 webster
see also:
accost cutlet the coast is clear coast guard coast rat bathyergus suillus 
sand mole coast waiter 

[3] : Moby Thesaurus II by Grady Ward, 1.0

53 moby thesaurus words for "coast guard":
   naval construction battalion, rn, royal navy, seabees, usn,
   united states navy, advance guard, air-sea rescue, argosy, armada,
   armed guard, bank guard, cordon, cordon sanitaire, division,
   escadrille, fleet, flotilla, garrison, goalie, goalkeeper,
   goaltender, guard, guarder, guardsman, inlying picket, jailer,
   lifeboat, lifeguard, lifesaver, marine, merchant fleet,
   merchant marine, merchant navy, mosquito fleet, naval forces,
   naval militia, naval reserve, navy, outguard, outpost, picket,
   rear guard, rescuer, savior, security guard, squadron, task force,
   task group, train guard, van, vanguard, warder

Coast Guard >> C Words
Coast Guard, definition of term: Coast Guard
coast+guard_pag1.html

Coast >> C Words
Coast, definition of term: Coast
coast_pag1.html

Guard >> G Words
Guard, definition of term: Guard
guard_pag1.html

Guard Cells >> G Words
Guard Cells, definition of term: Guard Cells
guard+cells_pag1.html

Guard Hair >> G Words
Guard Hair, definition of term: Guard Hair
guard+hair_pag1.html

Crossing Guard >> C Words
Crossing Guard, definition of term: Crossing Guard
crossing+guard_pag1.html

Color Guard >> C Words
Color Guard, definition of term: Color Guard
color+guard_pag1.html

Gold Coast >> G Words
Gold Coast, definition of term: Gold Coast
gold+coast_pag1.html