sex object vs worker

sex object and worker both are nouns.

Word	Noun	Adjective	Verb	Adverb
sex object	Yes	No	No	No
worker	Yes	No	No	No

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

Other hypernyms of sex object include actor, doer.

sex object (noun)	worker (noun)
any person regarded simply as an object of sexual gratification	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