theft vs larceny

theft and larceny both are nouns.

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

As nouns, theft and larceny are synonyms defined as:

Other synonyms of theft include stealing, thievery, thieving.

theft (noun)	larceny (noun)
the act of taking something from someone unlawfully	the act of taking something from someone unlawfully