beef
bellyache
bellyaching
bitch
bitching
complaining
complaint
complaintful
crabbing
crabby
cranky
croaking
destructive criticism
disappointed
discontented
disgruntled
displeased
dissatisfied
dissent
envious
faultfinding
grievance
gripe
griping
groan
groaning
grouchy
grouse
grousing
growling
grumbling
holler
howl
kick
kicking
malcontent
malcontented
murmuring
muttering
out of humor
peeve
peevish
peevishness
pet peeve
petulance
petulant
protest
querulant
querulous
querulousness
briefing
debriefing
leafing