conjectural vs hypothetical

conjectural is not a noun while hypothetical is a noun.

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

As adjectives, conjectural and hypothetical are synonyms defined as:

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

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

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

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