Slav vs doer

Slav and doer both are nouns.

Word	Noun	Adjective	Verb	Adverb
Slav	Yes	Yes	No	No
doer	Yes	No	No	No

As nouns, doer is a hypernym of Slav; that is, doer is a word with a broader meaning than Slav:

Slav: any member of the people of eastern Europe or Asian Russia who speak a Slavonic language
doer: a person who acts and gets things done

Other hypernyms of Slav include European, actor, worker.

Slav (noun)	doer (noun)
any member of the people of eastern Europe or Asian Russia who speak a Slavonic language	a person who acts and gets things done

Slav (adjective)	doer (adjective)
speaking a Slavic language