unlighted vs unilluminated

unlighted and unilluminated both are adjectives.

Word	Noun	Adjective	Verb	Adverb
unlighted	No	Yes	No	No
unilluminated	No	Yes	No	No

As adjectives, unlighted and unilluminated are synonyms defined as:

Other synonyms of unlighted include lightless, unlit.

unlighted (adjective)	unilluminated (adjective)
not set afire or burning	without illumination
without illumination