suppositional vs supposititious

suppositional and supposititious both are adjectives.

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

As adjectives, suppositional and supposititious are synonyms defined as:

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

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

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