slaver vs holder

slaver and holder both are nouns.

Word	Noun	Adjective	Verb	Adverb
slaver	Yes	No	Yes	No
holder	Yes	No	No	No

As nouns, holder is a hypernym of slaver; that is, holder is a word with a broader meaning than slaver:

slaver (noun)	holder (noun)
a person engaged in slave trade	a holding device
someone who holds slaves	the person who is in possession of a check or note or bond or document of title that is endorsed to him or to whoever holds it
	a person who holds something

slaver (verb)	holder (verb)
let saliva drivel from the mouth