son of a bitch vs SOB

son of a bitch and SOB both are nouns.

Word	Noun	Adjective	Verb	Adverb
son of a bitch	Yes	No	No	No
SOB	Yes	No	No	No

As nouns, son of a bitch and SOB are synonyms defined as:

son of a bitch and SOB: insulting terms of address for people who are stupid or irritating or ridiculous

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

son of a bitch (noun)	SOB (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 dyspneic condition