trooper vs dragoon

trooper and dragoon both are nouns.

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

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

trooper: a soldier mounted on horseback
dragoon: a member of a European military unit formerly composed of heavily armed cavalrymen

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

trooper (noun)	dragoon (noun)
a mounted police officer	a member of a European military unit formerly composed of heavily armed cavalrymen
a soldier in a motorized army unit
a state police officer
a soldier mounted on horseback

trooper (verb)	dragoon (verb)
	compel by coercion, threats, or crude means
	subjugate by imposing troops