censor vs blue-pencil

censor is a noun but blue-pencil is not a noun.

Word	Noun	Adjective	Verb	Adverb
censor	Yes	No	Yes	No
blue-pencil	No	No	Yes	No

As verbs, blue-pencil is a hyponym of censor; that is, blue-pencil is a word with a more specific, narrower meaning than censor:

Other hyponyms of censor include delete, edit.

censor (noun)	blue-pencil (noun)
a person who is authorized to read publications or correspondence or to watch theatrical performances and suppress in whole or in part anything considered obscene or politically unacceptable
someone who censures or condemns

censor (verb)	blue-pencil (verb)
subject to political, religious, or moral censorship	cut or eliminate
forbid the public distribution of (a movie or a newspaper)