unimaginative vs uninventive

unimaginative and uninventive both are adjectives.

Word	Noun	Adjective	Verb	Adverb
unimaginative	No	Yes	No	No
uninventive	No	Yes	No	No

As adjectives, unimaginative and uninventive are synonyms defined as:

unimaginative and uninventive: deficient in originality or creativity; lacking powers of invention

Other synonyms of unimaginative include sterile, uninspired.

unimaginative (adjective)	uninventive (adjective)
lacking spontaneity or originality or individuality	deficient in originality or creativity; lacking powers of invention
dealing only with concrete facts
deficient in originality or creativity; lacking powers of invention