groundwork vs supposal

groundwork and supposal both are nouns.

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

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

groundwork: 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 groundwork include assumption, supposition.

groundwork (noun)	supposal (noun)
preliminary preparation as a basis or foundation	a hypothesis that is taken for granted
lowest support of a structure	the cognitive process of supposing
the fundamental assumptions from which something is begun or developed or calculated or explained