suppositious vs supposititious

suppositious and supposititious both are adjectives.

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

As adjectives, suppositious and supposititious are synonyms defined as:

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

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

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