double up vs punt

double up is not a noun while punt is a noun.

Word	Noun	Adjective	Verb	Adverb
double up	No	No	Yes	No
punt	Yes	No	Yes	No

As verbs, punt is a hypernym of double up; that is, punt is a word with a broader meaning than double up:

Other hypernyms of double up include back, bet on, gage, game, stake.

double up (noun)	punt (noun)
	formerly the basic unit of money in Ireland; equal to 100 pence
	(football) a kick in which the football is dropped from the hands and kicked before it touches the ground
	an open flat-bottomed boat used in shallow waters and propelled by a long pole

double up (verb)	punt (verb)
stake winnings from one bet on a subsequent wager	place a bet on
bend over or curl up, usually with laughter or pain	propel with a pole
share a room or a bed designed for only one person	kick the ball