1. had better. This common idiom is used in the form
We had better go home or
We'd better go home; the negative form is
We'd better not go home and the interrogative
Hadn't we better go home?. Informally (but not in more formal contexts), the word
had is sometimes omitted:
We better go home; and in the second person (as an imperative) the preceding pronoun is omitted too:
When you're feeling censorious, better ask yourself which you'd choose—P. D. James, 1986.
2. better, bettor. In the meaning 'one who bets',
bettor is more common in American English, and
better in British English.
Bettor has the advantage of being distinct from the comparative of
good, although their distinct uses keep them out of each other's way.