ante vs bet on

ante is a noun but bet on is not a noun.

Word	Noun	Adjective	Verb	Adverb
ante	Yes	No	Yes	No
bet on	No	No	Yes	No

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

Other hypernyms of ante include back, gage, game, punt, stake.

ante (noun)	bet on (noun)
(poker) the initial contribution that each player makes to the pot

ante (verb)	bet on (verb)
place one's stake	place a bet on