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

militant \mil"itant\, a. l. militans, -antis, p. pr. of
   militare to be soldier: cf. f. militant. see militate.
   engaged in warfare; fighting; combating; serving as a
   soldier. -- mil"itantly, adv.
   1913 webster

         at which command the powers militant . . .
         moved on in silence.                     --milton.
   1913 webster

   church militant, the christian church on earth, which is
      supposed to be engaged in a constant warfare against its
      enemies, and is thus distinguished from the church
      triumphant, in heaven.
      1913 webster
see also:
militate mil"itantly church militant 

[2] : WordNet (r) 2.0

militant
     adj 1: engaged in war; "belligerent or warring nations"; "a
            fighting war" syn: belligerent, fighting, war-ridden,
             warring
     2: showing a fighting disposition without self-seeking; "highly
        competitive sales representative"; "militant in fighting
        for better wages for workers"; "his self-assertive and
        ubiquitous energy" syn: competitive
     n : a militant reformer syn: activist
see also:
belligerent fighting war-ridden warring competitive activist 

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

165 moby thesaurus words for "militant":
   active, activist, activistic, aggressive, aggressor, alive,
   animated, antagonistic, assertive, at war, ball of fire, battler,
   battling, beaver, bellicose, belligerent, belted knight, bickerer,
   big-time operator, blade, bloodthirsty, bloody, bloody-minded,
   bouncing, bouncy, bravo, brawler, breezy, brisk, bubbly, bully,
   bullyboy, bustler, busy bee, chauvinist, chauvinistic, chipper,
   combatant, combative, competitor, contender, contentious,
   contestant, disputant, doer, duelist, eager beaver, ebullient,
   effervescent, embattled, enemy, energetic, enforcer, enthusiast,
   fencer, ferocious, feuder, fierce, fighter, fighting,
   fighting cock, foilsman, frisky, full of fight, full of go,
   full of life, full of pep, gamecock, gladiator, go-getter, goon,
   gorilla, hatchet man, hawkish, hood, hoodlum, hooligan, hostile,
   human dynamo, hustler, inimical, jingo, jingoish, jingoist,
   jingoistic, jouster, knight, live, live wire, lively,
   man of action, man of deeds, martial, mercurial, militaristic,
   military, new broom, offensive, operator, peppy, perky, pert,
   plug-ugly, political activist, powerhouse, pugnacious, pushful,
   pushing, pushy, quarreler, quarrelsome, quicksilver, rioter, rival,
   rough, rowdy, ruffian, saber-rattling, sabreur, sanguinary,
   sanguineous, savage, scrapper, scrappy, scuffler, self-assertive,
   smacking, snappy, soldier, soldierlike, soldierly, spanking,
   spirited, sprightly, spry, squabbler, strong arm, strong-arm man,
   strong-armer, struggler, swashbuckler, sword, swordplayer,
   swordsman, take-charge guy, thug, tilter, tough, trigger-happy,
   truculent, tussler, unfriendly, unpacific, unpeaceable, unpeaceful,
   up in arms, vivacious, warlike, warmongering, warring, warrior,
   wheeler-dealer, winner, wrangler, zingy

Militant >> M Words
Militant, definition of term: Militant
militant_pag1.html

Church Militant >> C Words
Church Militant, definition of term: Church Militant
church+militant_pag1.html