weeder vs fieldhand

weeder and fieldhand both are nouns.

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

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

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

weeder (noun)	fieldhand (noun)
a hand tool for removing weeds	a hired hand on a farm
a farmhand hired to remove weeds