stealing vs petty

stealing and petty both are nouns.

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

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

stealing: the act of taking something from someone unlawfully
petty: larceny of property having a value less than some amount (the amount varies by locale)

stealing (noun)	petty (noun)
the act of taking something from someone unlawfully	larceny of property having a value less than some amount (the amount varies by locale)
avoiding detection by moving carefully

stealing (adjective)	petty (adjective)
	inferior in rank or status
	contemptibly narrow in outlook
	(informal) small and of little importance