armor vs armorer

armor and armorer both are nouns.

Word	Noun	Adjective	Verb	Adverb
armor	Yes	No	Yes	No
armorer	Yes	No	No	No

armor (noun)	armorer (noun)
tough more-or-less rigid protective covering of an animal or plant	a manufacturer of firearms
protective covering made of metal and used in combat	an enlisted man responsible for the upkeep of small arms and machine guns etc.
a military unit consisting of armored fighting vehicles	a worker skilled in making armor or arms

armor (verb)	armorer (verb)
equip with armor