feller vs lad

feller and lad both are nouns.

Word	Noun	Adjective	Verb	Adverb
feller	Yes	No	No	No
lad	Yes	No	No	No

As nouns, feller and lad are synonyms defined as:

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

feller (noun)	lad (noun)
a boy or man	a male child (a familiar term of address to a boy)
a person who fells trees	a boy or man