immature vs unfledged

immature and unfledged both are adjectives.

Word	Noun	Adjective	Verb	Adverb
immature	No	Yes	No	No
unfledged	No	Yes	No	No

As adjectives, immature and unfledged are synonyms defined as:

immature (adjective)	unfledged (adjective)
not yet mature	(of birds) not yet having developed feathers
characteristic of a lack of maturity	young and inexperienced
(used of living things especially persons) in an early period of life or development or growth	(of an arrow) not equipped with feathers
(of birds) not yet having developed feathers
not fully developed or mature; not ripe