vestigial vs undeveloped

vestigial and undeveloped both are adjectives.

Word	Noun	Adjective	Verb	Adverb
vestigial	No	Yes	No	No
undeveloped	No	Yes	No	No

vestigial (adjective)	undeveloped (adjective)
not fully developed in mature animals	not developed, mature, or fully formulated
	not developed, improved, exploited or used