double up vs bet on

double up and bet on both are verbs.

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

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

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

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