grand theft vs larceny

grand theft and larceny both are nouns.

Word	Noun	Adjective	Verb	Adverb
grand theft	Yes	No	No	No
larceny	Yes	No	No	No

As nouns, larceny is a hypernym of grand theft; that is, larceny is a word with a broader meaning than grand theft:

grand theft: larceny of property having a value greater than some amount (the amount varies by locale)
larceny: the act of taking something from someone unlawfully

Other hypernyms of grand theft include stealing, theft, thievery, thieving.

grand theft (noun)	larceny (noun)
larceny of property having a value greater than some amount (the amount varies by locale)	the act of taking something from someone unlawfully