Synonym for irritable is "moody"

cantankerous [adjective]

means "ill-tempered"
ill-natured, crabby, cranky, disagreeable, testy, irritable

choleric [adjective]

means "testy"
peppery, churlish, hot-headed, hot-tempered, irascible, irritable

crabby [adjective]

means "ill-tempered"
ill-natured, cranky, cantankerous, disagreeable, testy, irritable

cranky [adjective]

means "ill-tempered"
ill-natured, crabby, cantankerous, disagreeable, testy, irritable

disagreeable [adjective]

means "unpleasant"
obnoxious, offensive, irritable, difficult, cranky, rude

disappointed [adjective]

means "discontented"
disgruntled, annoyed, displeased, irritated, disturbed, irritable

disgruntled [adjective]

means "discontented"
disappointed, annoyed, displeased, irritated, disturbed, irritable

excitable [adjective]

means "hasty"
fiery, fretful, irascible, irritable, peevish, petulant

fretful [adjective]

means "chafing"
irritable, impatient, testy, choleric, hot, violent

grouchy [adjective]

means "cross"
irritable, peevish, short-tempered, testy, touchy, sour

grumpy [adjective]

means "grouchy"
sullen, testy, cantankerous, cross, crabby, irritable

hasty [adjective]

means "excitable"
fiery, fretful, irascible, irritable, peevish, petulant

hot-tempered [adjective]

means "testy"
choleric, churlish, hotheaded, peppery, irascible, irritable

huffy [adjective]

means "tense"
nervous, irritable, touchy, sensitive, unstable

ill-tempered [verb]

means "cranky"
ill-natured, crabby, cantankerous, disagreeable, testy, irritable

- conjugate verb ill-tempered

impatient [adjective]

means "chafing"
irritable, fretful, testy, choleric, hot, violent

indignant [adjective]

means "angry"
sore, irritable, irked, irritated, vexatious, resentful

irascible [adjective]

means "testy"
choleric, churlish, hot-headed, hot-tempered, peppery, irritable

itching [adjective]

means "chafing"
irritable, fretful, testy, choleric, hot, violent

nervous [adjective]

means "tense"
sensitive, irritable, touchy, huffy, unstable

peevish [adjective]

means "cross"
irritable, sour, short-tempered, testy, touchy, grouchy

peppery [adjective]

means "testy"
choleric, churlish, hot-headed, hot-tempered, irascible, irritable

petulant [adjective]

means "testy"
choleric, churlish, hot-headed, hot-tempered, irascible, irritable

quick [adjective]

means "character trait"
irascible, irritable

quick-tempered [adjective]

means "abrupt"
irritable

sensitive [adjective]

means "tense"
nervous, irritable, touchy, huffy, unstable

sore [adjective]

means "feeling"
angry, indignant, irritable, irked, irritated, vexatious

sour [adjective]

means "behaviour"
cross, irritable, peevish, short-tempered, testy, touchy

sulky [adjective]

means "sullen"
moody, morose, glum, ill-humoured, irritable, churlish

testy [adjective]

means "peppery"
choleric, churlish, hot-headed, hot-tempered, irascible, irritable

waspish [adjective]