step on it vs barge

step on it is not a noun while barge is a noun.

Word	Noun	Adjective	Verb	Adverb
step on it	No	No	Yes	No
barge	Yes	No	Yes	No

As verbs, barge is a hyponym of step on it; that is, barge is a word with a more specific, narrower meaning than step on it:

Other hyponyms of step on it include push forward, thrust ahead, buck, charge, shoot, shoot down, tear, dart, dash, flash, scoot, scud, shoot.

step on it (noun)	barge (noun)
	a flatbottom boat for carrying heavy loads (especially on canals)

step on it (verb)	barge (verb)
move hurridly	push one's way
	transport by barge on a body of water