conceal vs bosom

conceal is not a noun while bosom is a noun.

Word	Noun	Adjective	Verb	Adverb
conceal	No	No	Yes	No
bosom	Yes	No	Yes	No

As verbs, bosom is a hyponym of conceal; that is, bosom is a word with a more specific, narrower meaning than conceal:

conceal (noun)	bosom (noun)
	a close affectionate and protective acceptance
	cloth that covers the chest or breasts
	either of two soft fleshy milk-secreting glandular organs on the chest of a woman
	a person's breast or chest
	the locus of feelings and intuitions
	the chest considered as the place where secret thoughts are kept

conceal (verb)	bosom (verb)
hold back; keep from being perceived by others	hold (someone) tightly in your arms, usually with fondness
prevent from being seen or discovered	hide in one's bosom