We don't have synonyms for pre-game yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are pregame, pre game and pregage.
(adj) :
Alternative spelling of pregame. [Taking place before, or in preparation for, a sporting event or other game.]
(n) :
Alternative spelling of pregame. [A social gathering of several friends who get together to drink before going out to a party or a sports game, in order to get a "buzz" before going out for the night.]
(adj) :
Alternative spelling of pregame. [Taking place before, or in preparation for, a sporting event or other game.]
(n) :
Alternative spelling of pregame. [A social gathering of several friends who get together to drink before going out to a party or a sports game, in order to get a "buzz" before going out for the night.]