nudnik vs blighter

nudnik and blighter both are nouns.

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

As nouns, blighter is a hypernym of nudnik; that is, blighter is a word with a broader meaning than nudnik:

Other hypernyms of nudnik include bore, dullard, cuss, gadfly, pest, pesterer.

nudnik (noun)	blighter (noun)
(Yiddish) someone who is a boring pest	a persistently annoying person
	a boy or man