ploughboy vs male child

ploughboy and male child both are nouns.

Word	Noun	Adjective	Verb	Adverb
ploughboy	Yes	No	No	No
male child	Yes	No	No	No

As nouns, male child is a hypernym of ploughboy; that is, male child is a word with a broader meaning than ploughboy:

Other hypernyms of ploughboy include boy.

ploughboy (noun)	male child (noun)
a boy who leads the animals that draw a plow	a youthful male person