fundament vs supposal

fundament and supposal both are nouns.

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

As nouns, supposal is a hypernym of fundament; that is, supposal is a word with a broader meaning than fundament:

fundament: the fundamental assumptions from which something is begun or developed or calculated or explained
supposal: a hypothesis that is taken for granted

Other hypernyms of fundament include assumption, supposition.

fundament (noun)	supposal (noun)
lowest support of a structure	a hypothesis that is taken for granted
the fleshy part of the human body that you sit on	the cognitive process of supposing
the fundamental assumptions from which something is begun or developed or calculated or explained