Definitions:

1. In sports, might refer to a particularly tough opponent or a challenging situation in the game. NOUN
   • The team kney they were in for a facer when they saw their rivals' lineup.
2. Refers to a machine or tool used for facing, which is a machining process that involves cutting a surface to make it flat or smooth, common in metalworking or woodworking. NOUN
   • The machinist used a facer to smooth the surface of the metal plate.
3. Refers to an unexpected or difficult situation that someone must confront, or a problem that requires immediate attention or resolution. NOUN
   • The sudden resignation of the CEO was a real facer for the company.

Synonyms:

• difficulty
• facing tool
• hurdle
• shock
• surprise