buster vs child

buster and child both are nouns.

Word	Noun	Adjective	Verb	Adverb
buster	Yes	No	No	No
child	Yes	No	No	No

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

Other hypernyms of buster include fry, kid, minor, nestling, nipper, shaver, small fry, tiddler, tike, tyke, youngster.

buster (noun)	child (noun)
a person (or thing) that breaks up or overpowers something	a young person of either sex
a person who breaks horses	a human offspring (son or daughter) of any age
a robust child	an immature childish person
an informal form of address for a man	a member of a clan or tribe
a person born in the generation following the baby boom when the birth rate fell dramatically