trigger-happy vs tearing

trigger-happy is not a noun while tearing is a noun.

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

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

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

Other synonyms of trigger-happy include fierce, vehement, violent.

trigger-happy (noun)	tearing (noun)
	shedding tears

trigger-happy (adjective)	tearing (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
irresponsible in the use of firearms