waterer vs field hand

waterer and field hand both are nouns.

Word	Noun	Adjective	Verb	Adverb
waterer	Yes	No	No	No
field hand	Yes	No	No	No

As nouns, field hand is a hypernym of waterer; that is, field hand is a word with a broader meaning than waterer:

Other hypernyms of waterer include farm worker, farmhand, fieldhand.

waterer (noun)	field hand (noun)
an assistant who supplies drinking water	a hired hand on a farm
someone who waters plants or crops