mechanized cavalry vs cavalry

mechanized cavalry and cavalry both are nouns.

Word	Noun	Adjective	Verb	Adverb
mechanized cavalry	Yes	No	No	No
cavalry	Yes	No	No	No

As nouns, cavalry is a hypernym of mechanized cavalry; that is, cavalry is a word with a broader meaning than mechanized cavalry:

mechanized cavalry: an armored unit of a modern army equipped with motor vehicles
cavalry: a highly mobile army unit

mechanized cavalry (noun)	cavalry (noun)
an armored unit of a modern army equipped with motor vehicles	a highly mobile army unit
	troops trained to fight on horseback