fledgeling vs newcomer

fledgeling and newcomer both are nouns.

Word	Noun	Adjective	Verb	Adverb
fledgeling	Yes	Yes	No	No
newcomer	Yes	No	No	No

As nouns, fledgeling and newcomer are synonyms defined as:

Other synonyms of fledgeling include entrant, fledgling, freshman, neophyte, newbie, starter.

fledgeling (noun)	newcomer (noun)
young bird that has just fledged or become capable of flying	any new participant in some activity
any new participant in some activity	a recent arrival

fledgeling (adjective)	newcomer (adjective)
(of a young bird) having acquired its flight feathers