chicken sexer vs chooser

chicken sexer and chooser both are nouns.

Word	Noun	Adjective	Verb	Adverb
chicken sexer	Yes	No	No	No
chooser	Yes	No	No	No

As nouns, chooser is a hypernym of chicken sexer; that is, chooser is a word with a broader meaning than chicken sexer:

chicken sexer: a trained person hired to determine the sex of chicken and other hatchlings.
chooser: a person who chooses or selects out

Other hypernyms of chicken sexer include picker, selector.

chicken sexer (noun)	chooser (noun)
a trained person hired to determine the sex of chicken and other hatchlings.	a person who chooses or selects out