tooshie vs fundament

tooshie and fundament both are nouns.

Word	Noun	Adjective	Verb	Adverb
tooshie	Yes	No	No	No
fundament	Yes	No	No	No

As nouns, tooshie and fundament are synonyms defined as:

tooshie and fundament: the fleshy part of the human body that you sit on

tooshie (noun)	fundament (noun)
the fleshy part of the human body that you sit on	lowest support of a structure
	the fleshy part of the human body that you sit on
	the fundamental assumptions from which something is begun or developed or calculated or explained