suppositious vs hypothetical

suppositious is not a noun while hypothetical is a noun.

Word	Noun	Adjective	Verb	Adverb
suppositious	No	Yes	No	No
hypothetical	Yes	Yes	No	No

As adjectives, suppositious and hypothetical are synonyms defined as:

suppositious and hypothetical: based primarily on surmise rather than adequate evidence

Other synonyms of suppositious include conjectural, divinatory, hypothetic, supposed, suppositional, supposititious.

suppositious (noun)	hypothetical (noun)
	a hypothetical possibility, circumstance, statement, proposal, situation, etc.

suppositious (adjective)	hypothetical (adjective)
based primarily on surmise rather than adequate evidence	based primarily on surmise rather than adequate evidence