blighter vs fella

blighter and fella both are nouns.

Word	Noun	Adjective	Verb	Adverb
blighter	Yes	No	No	No
fella	Yes	No	No	No

As nouns, blighter and fella are synonyms defined as:

Other synonyms of blighter include bloke, chap, cuss, feller, fellow, gent, lad.

blighter (noun)	fella (noun)
a persistently annoying person	a boy or man
a boy or man