Negroid vs worker

Negroid and worker both are nouns.

Word	Noun	Adjective	Verb	Adverb
Negroid	Yes	No	No	No
worker	Yes	No	No	No

As nouns, worker is a hypernym of Negroid; that is, worker is a word with a broader meaning than Negroid:

Negroid: a person with African ancestry, "Negro" and "Negroid" are archaic and pejorative today
worker: a person who acts and gets things done

Other hypernyms of Negroid include actor, doer.

Negroid (noun)	worker (noun)
a person with African ancestry, "Negro" and "Negroid" are archaic and pejorative today	sterile member of a colony of social insects that forages for food and cares for the larvae
	a person who works at a specific occupation
	a member of the working class (not necessarily employed)
	a person who acts and gets things done