pimp vs whoremaster

pimp and whoremaster both are nouns.

Word	Noun	Adjective	Verb	Adverb
pimp	Yes	No	Yes	No
whoremaster	Yes	No	No	No

As nouns, whoremaster is a hyponym of pimp; that is, whoremaster is a word with a more specific, narrower meaning than pimp:

pimp: someone who procures customers for whores (in England they call a pimp a ponce)
whoremaster: a pimp who procures whores

Other hyponyms of pimp include procuress, whoremonger.

pimp (noun)	whoremaster (noun)
someone who procures customers for whores (in England they call a pimp a ponce)	a pimp who procures whores
	a prostitute's customer

pimp (verb)	whoremaster (verb)
arrange for sexual partners for others