gun muzzle vs muzzle

gun muzzle and muzzle both are nouns.

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

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

gun muzzle (noun)	muzzle (noun)
the open circular discharging end of a gun	forward projecting part of the head of certain animals; includes the jaws and nose
	restraint put into a person's mouth to prevent speaking or shouting
	the open circular discharging end of a gun
	a leather or wire restraint that fits over an animal's snout (especially a dog's nose and jaws) and prevents it from eating or biting

gun muzzle (verb)	muzzle (verb)
	tie a gag around someone's mouth in order to silence them
	prevent from speaking out
	fit with a muzzle