undertaker vs trained worker

undertaker and trained worker both are nouns.

Word	Noun	Adjective	Verb	Adverb
undertaker	Yes	No	No	No
trained worker	Yes	No	No	No

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

Other hypernyms of undertaker include skilled worker, skilled workman.

undertaker (noun)	trained worker (noun)
one whose business is the management of funerals	a worker who has acquired special skills