From WordNet (r) 2.0 (August 2003) [wn]:
grouch
n : a bad-tempered person [syn: grump, crank, churl,
crosspatch]
v : show one's unhappiness or critical attitude; "He scolded
about anything that he thought was wrong"; "We grumbled
about the increased work load" [syn: grumble, scold]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
grouch \grouch\ (grouch), n.
A bad-tempered person.
Syn: grump, crank, churl, crosspatch.
[WordNet 1.5]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
grouch \grouch\ v. i.
to complain habitually, especially about minor or routine
annoyances.
Syn: grumble, gripe.
[WordNet 1.5]