[1] : WordNet (r) 2.0

sissy
     adj : having unsuitable feminine qualities syn: effeminate, emasculate,
            epicene, cissy, sissified, sissyish
     n : a timid man or boy considered childish or unassertive syn:
         pantywaist, pansy, milksop, milquetoast
see also:
effeminate emasculate epicene cissy sissified sissyish 
pantywaist pansy milksop milquetoast 

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

130 moby thesaurus words for "sissy":
   lord fauntleroy, milquetoast, percy, afraid, aunt, auntie, baby,
   big baby, blood brother, brethren, brother, bub, bubba, bud, buddy,
   chicken, chicken liver, chickenhearted, country cousin, cousin,
   cousin once removed, cousin twice removed, coward, cowardly, cowed,
   cream puff, crybaby, daughter, daunted, dismayed, doormat,
   dull tool, effeminate, epicene, fainthearted, father, fearful,
   first cousin, foster brother, fraid-cat, fraidy-cat, frater, funk,
   funker, funking, funky, goody-goody, grandnephew, grandniece,
   granduncle, great-aunt, great-uncle, gutless wonder, half brother,
   henhearted, intimidated, invertebrate, jellyfish, kid brother,
   lightweight, lily, lily liver, lily-livered, meek soul,
   milk-livered, milksop, milksoppish, milksoppy, mollycoddle, mother,
   mouse, mousy, muliebrous, namby-pamby, nance, nancy, nebbish,
   nephew, niece, nonentity, nuncle, nunks, nunky, old woman,
   old-womanish, overtimid, overtimorous, panic-prone, panicky, pansy,
   pantywaist, pigeonhearted, prissy, pushover, rabbity, sad sack,
   scaredy-cat, second cousin, sis, sissified, sissyish, sister,
   sister-german, sistern, soft, softling, softy, son, sop,
   stepbrother, stepsister, timid, timorous, unc, uncle, uncs,
   unmanly, unmanned, uterine brother, weak, weak sister, weak-kneed,
   weakhearted, weakling, wet, white feather, white liver,
   white-livered, womanish, yellow

Sissy >> S Words
Sissy, definition of term: Sissy
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