fundament vs dirty word

fundament and dirty word both are nouns.

Word	Noun	Adjective	Verb	Adverb
fundament	Yes	No	No	No
dirty word	Yes	No	No	No

fundament (noun)	dirty word (noun)
lowest support of a structure	an offensive or indecent word or phrase
the fleshy part of the human body that you sit on	a word that is considered to be unmentionable
the fundamental assumptions from which something is begun or developed or calculated or explained