theft vs stealing

theft and stealing both are nouns.

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

As nouns, theft and stealing are synonyms defined as:

Other synonyms of theft include larceny, thievery, thieving.

theft (noun)	stealing (noun)
the act of taking something from someone unlawfully	the act of taking something from someone unlawfully
	avoiding detection by moving carefully