armorer vs armourer

armorer and armourer both are nouns.

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

As nouns, armorer and armourer are synonyms defined as:

As nouns, armorer and armourer are synonyms defined as:

armorer and armourer: an enlisted man responsible for the upkeep of small arms and machine guns etc.

Other synonyms of armorer include artificer.

As nouns, armorer and armourer are synonyms defined as:

armorer (noun)	armourer (noun)
a manufacturer of firearms	a manufacturer of firearms
an enlisted man responsible for the upkeep of small arms and machine guns etc.	an enlisted man responsible for the upkeep of small arms and machine guns etc.
a worker skilled in making armor or arms	a worker skilled in making armor or arms