Definitions:

1. An individual who places bets or engages in the act of wavering. NOUN
   • The wagerer carefully considered his options before placing a bet on the horse race.
2. Describes someone who participates in various forms of better, whether casually among friends, in organized gambling settings, or in financial matters. NOUN
   • As a frequent wagerer, he often bets with his friends on sport games.

Synonyms:

• bettor
• gambler
• risk-taker
• staker