squire vs armiger

squire and armiger both are nouns.

Word	Noun	Adjective	Verb	Adverb
squire	Yes	No	Yes	No
armiger	Yes	No	No	No

As nouns, armiger is a hyponym of squire; that is, armiger is a word with a more specific, narrower meaning than squire:

Other hyponyms of squire include armor-bearer.

squire (noun)	armiger (noun)
an English country landowner	a squire carrying the armor of a knight
young nobleman attendant on a knight	a nobleman entitled to bear heraldic arms
a man who attends or escorts a woman

squire (verb)	armiger (verb)
attend upon as a squire; serve as a squire