bullshit vs sham

bullshit and sham both are nouns.

Word	Noun	Adjective	Verb	Adverb
bullshit	Yes	No	Yes	No
sham	Yes	Yes	Yes	No

As verbs, sham is a hypernym of bullshit; that is, sham is a word with a broader meaning than bullshit:

Other hypernyms of bullshit include affect, dissemble, feign, pretend.

bullshit (noun)	sham (noun)
Obscene word for unacceptable behavior	something that is a counterfeit; not what it seems to be
	a person who makes deceitful pretenses

bullshit (adjective)	sham (adjective)
	adopted in order to deceive

bullshit (verb)	sham (verb)
speak insincerely or without regard for facts or truths	make believe with the intent to deceive
	make a pretence of