The Collaborative International Dictionary of English v.0.48:

Crotchety \Crotch"et*y\ (kr?ch"?t-?), a.
   Given to crotchets; subject to whims; as, a crotchety man.
   [1913 Webster]

WordNet (r) 3.0 (2006):

crotchety
    adj 1: having a difficult and contrary disposition; "a
           cantankerous and venomous-tongued old lady"- Dorothy
           Sayers [syn: cantankerous, crotchety, ornery]

Moby Thesaurus II by Grady Ward, 1.0:

89 Moby Thesaurus words for "crotchety":
   abnormal, anomalous, antagonistic, antipathetic, arbitrary,
   bearish, breakaway, cankered, capricious, clashing, conflicting,
   contradicting, contradictory, counteractant, counteracting,
   counteractive, countervailing, counterworking, crank, crankish,
   cranky, cross-grained, deviant, deviative, different, dissident,
   divergent, dotty, eccentric, erratic, exceptional, fanciful,
   fantasied, fantastic, fey, flaky, freakish, funny, harebrained,
   hostile, humorsome, idiocratic, idiosyncratic, inimical, irregular,
   kinky, kooky, maggoty, moody, motiveless, nonconformist, notional,
   nutty, odd, oddball, opposing, oppositional, oppugnant, ornery,
   peculiar, perverse, petulant, queer, quirky, reactionary,
   recalcitrant, renitent, repugnant, resistant, revolutionary,
   screwball, screwy, singular, strange, temperamental, twisted,
   unconventional, unnatural, unreasonable, unrestrained, vagarious,
   vagrant, vinegarish, vinegary, wacky, wanton, waspish, wayward,
   whimsical