bet on vs double up

bet on and double up both are verbs.

Word	Noun	Adjective	Verb	Adverb
bet on	No	No	Yes	No
double up	No	No	Yes	No

As verbs, double up is a hyponym of bet on; that is, double up is a word with a more specific, narrower meaning than bet on:

Other hyponyms of bet on include ante, parlay.

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