fierce vs trigger-happy

fierce and trigger-happy both are adjectives.

Word	Noun	Adjective	Verb	Adverb
fierce	No	Yes	No	No
trigger-happy	No	Yes	No	No

As adjectives, fierce and trigger-happy are synonyms defined as:

fierce and trigger-happy: marked by extreme intensity of emotions or convictions; inclined to react violently; fervid

Other synonyms of fierce include tearing, vehement, violent.

fierce (adjective)	trigger-happy (adjective)
marked by extreme intensity of emotions or convictions; inclined to react violently; fervid	marked by extreme intensity of emotions or convictions; inclined to react violently; fervid
ruthless in competition	irresponsible in the use of firearms
violently agitated and turbulent
marked by extreme and violent energy