1. (adjective) easily irritated or annoyed

• cranky
• fractious
• nettlesome
• peckish
• peevish
• pettish
• petulant
• scratchy
• techy
• testy
• tetchy

2. (adjective) capable of responding to stimuli

• excitable

1. (adjective) easily irritated or annoyed

• ill-natured

2. (adjective) abnormally sensitive to a stimulus

• sensitive

3. (adjective) capable of responding to stimuli

• sensitive

1. (adjective) abnormally sensitive to a stimulus

• pathology

2. (adjective) capable of responding to stimuli

• physiology

1. (adjective) easily irritated or annoyed

• biliousness
• biliousness
• irritability
• irritability
• peevishness
• peevishness
• pettishness
• pettishness
• snappishness
• snappishness
• surliness
• surliness
• temper
• temper
• choler
• choler
• choler
• crossness
• crossness
• crossness
• fretfulness
• fretfulness
• fretfulness
• fussiness
• fussiness
• fussiness
• irritability
• irritability
• irritability
• peevishness
• peevishness
• peevishness
• petulance
• petulance
• petulance
• churl
• crank
• crosspatch
• grouch
• grump
• contrariness
• crankiness
• crotchetiness
• grumpiness
• fractiousness
• unruliness
• wilfulness
• willfulness
• testiness
• testiness
• tetchiness
• tetchiness
• touchiness
• touchiness

2. (adjective) abnormally sensitive to a stimulus

• excitability
• irritability