get ahead vs steal

get ahead is not a noun while steal is a noun.

Word	Noun	Adjective	Verb	Adverb
get ahead	No	No	Yes	No
steal	Yes	No	Yes	No

As verbs, steal is a hyponym of get ahead; that is, steal is a word with a more specific, narrower meaning than get ahead:

Other hyponyms of get ahead include rack up, score, tally.

get ahead (noun)	steal (noun)
	a stolen base; an instance in which a base runner advances safely during the delivery of a pitch (without the help of a hit or walk or passed ball or wild pitch)
	an advantageous purchase

get ahead (verb)	steal (verb)
obtain advantages, such as points, etc.	steal a base
	move stealthily
	take without the owner's consent