waterer vs fieldhand

waterer and fieldhand both are nouns.

Word	Noun	Adjective	Verb	Adverb
waterer	Yes	No	No	No
fieldhand	Yes	No	No	No

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

Other hypernyms of waterer include farm worker, farmhand, field hand.

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