Legionnaire vs vet

Legionnaire and vet both are nouns.

Word	Noun	Adjective	Verb	Adverb
Legionnaire	Yes	No	No	No
vet	Yes	No	Yes	No

As nouns, vet is a hypernym of Legionnaire; that is, vet is a word with a broader meaning than Legionnaire:

Other hypernyms of Legionnaire include ex-serviceman, veteran.

Legionnaire (noun)	vet (noun)
a member of the American Legion	a doctor who practices veterinary medicine
	a person who has served in the armed forces

Legionnaire (verb)	vet (verb)
	provide veterinary care for
	provide (a person) with medical care
	examine carefully
	work as a veterinarian