trigger vs gun trigger

trigger and gun trigger both are nouns.

Word	Noun	Adjective	Verb	Adverb
trigger	Yes	No	Yes	No
gun trigger	Yes	No	No	No

As nouns, trigger and gun trigger are synonyms defined as:

trigger and gun trigger: lever that activates the firing mechanism of a gun

trigger (noun)	gun trigger (noun)
an act that sets in motion some course of events	lever that activates the firing mechanism of a gun
lever that activates the firing mechanism of a gun
a device that activates or releases or causes something to happen

trigger (verb)	gun trigger (verb)
release or pull the trigger on
put in motion or move to act