suppositious vs conjectural

suppositious and conjectural both are adjectives.

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

As adjectives, suppositious and conjectural are synonyms defined as:

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

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

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