indexer vs trained worker

indexer and trained worker both are nouns.

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

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

Other hypernyms of indexer include skilled worker, skilled workman.

indexer (noun)	trained worker (noun)
someone who provides an index	a worker who has acquired special skills