blighter vs pesterer

blighter and pesterer both are nouns.

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

As nouns, blighter and pesterer are synonyms defined as:

Other synonyms of blighter include cuss, gadfly, pest.

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