stock farmer vs breeder

stock farmer and breeder both are nouns.

Word	Noun	Adjective	Verb	Adverb
stock farmer	Yes	No	No	No
breeder	Yes	No	No	No

As nouns, breeder is a hyponym of stock farmer; that is, breeder is a word with a more specific, narrower meaning than stock farmer:

Other hyponyms of stock farmer include stock breeder, beef man, cattleman, cow man, sheepman.

stock farmer (noun)	breeder (noun)
farmer who breed or raises livestock	a person who breeds animals