supposititious vs conjectural

supposititious and conjectural both are adjectives.

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

As adjectives, supposititious and conjectural are synonyms defined as:

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

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

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