dickhead vs cocksucker

dickhead and cocksucker both are nouns.

Word	Noun	Adjective	Verb	Adverb
dickhead	Yes	No	No	No
cocksucker	Yes	No	No	No

As nouns, dickhead and cocksucker are synonyms defined as:

dickhead and cocksucker: insulting terms of address for people who are stupid or irritating or ridiculous

Other synonyms of dickhead include asshole, bastard, mother fucker, motherfucker, prick, shit, SOB, son of a bitch, whoreson.

dickhead (noun)	cocksucker (noun)
insulting terms of address for people who are stupid or irritating or ridiculous	insulting terms of address for people who are stupid or irritating or ridiculous
	a person who performs fellatio