blighter vs lad

blighter and lad both are nouns.

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

As nouns, blighter and lad are synonyms defined as:

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

blighter (noun)	lad (noun)
a persistently annoying person	a male child (a familiar term of address to a boy)
a boy or man	a boy or man