fictive vs fictitious

fictive and fictitious both are adjectives.

Word	Noun	Adjective	Verb	Adverb
fictive	No	Yes	No	No
fictitious	No	Yes	No	No

As adjectives, fictive and fictitious are synonyms defined as:

Other synonyms of fictive include assumed, false, pretended, put on, sham.

fictive (adjective)	fictitious (adjective)
adopted in order to deceive	adopted in order to deceive
capable of imaginative creation	formed or conceived by the imagination