buster vs equestrian

buster and equestrian both are nouns.

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

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

Other hypernyms of buster include horseback rider.

buster (noun)	equestrian (noun)
a person (or thing) that breaks up or overpowers something	a person skilled in equitation
a person who breaks horses
a robust child
an informal form of address for a man
a person born in the generation following the baby boom when the birth rate fell dramatically

buster (adjective)	equestrian (adjective)
	of or relating to or featuring horseback riding
	of or relating to or composed of knights