trooper vs hussar

trooper and hussar both are nouns.

Word	Noun	Adjective	Verb	Adverb
trooper	Yes	No	No	No
hussar	Yes	No	No	No

As nouns, hussar is a hyponym of trooper; that is, hussar is a word with a more specific, narrower meaning than trooper:

trooper: a soldier mounted on horseback
hussar: a member of a European light cavalry unit; renowned for elegant dress

Other hyponyms of trooper include cuirassier, dragoon, lancer, Rough Rider.

trooper (noun)	hussar (noun)
a mounted police officer	a member of a European light cavalry unit; renowned for elegant dress
a soldier in a motorized army unit
a state police officer
a soldier mounted on horseback