vest vs unmentionable

vest and unmentionable both are nouns.

Word	Noun	Adjective	Verb	Adverb
vest	Yes	No	Yes	No
unmentionable	Yes	Yes	No	No

As nouns, unmentionable is a hypernym of vest; that is, unmentionable is a word with a broader meaning than vest:

Other hypernyms of vest include undergarment.

vest (noun)	unmentionable (noun)
a collarless men's undergarment for the upper part of the body	a garment worn under other garments
a man's sleeveless garment worn underneath a coat

vest (adjective)	unmentionable (adjective)
	unsuitable or forbidden as a topic of conversation

vest (verb)	unmentionable (verb)
clothe formally; especially in ecclesiastical robes
clothe oneself in ecclesiastical garments
place (authority, property, or rights) in the control of a person or group of persons
become legally vested
provide with power and authority