boffin vs researcher

boffin and researcher both are nouns.

Word	Noun	Adjective	Verb	Adverb
boffin	Yes	No	No	No
researcher	Yes	No	No	No

As nouns, researcher is a hypernym of boffin; that is, researcher is a word with a broader meaning than boffin:

boffin: (British slang) a scientist or technician engaged in military research
researcher: a scientist who devotes himself to doing research

Other hypernyms of boffin include investigator, research worker.

boffin (noun)	researcher (noun)
(British slang) a scientist or technician engaged in military research	a scientist who devotes himself to doing research