1. He who or that which straightens.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• straightners,
• straightned,
• straightner,
• strightened,
• streightened,
• staightener,
• straghtened,
• straigtener,
• straitener,
• sraightener,
• strightener,
• straightend,
• strighteners,
• straiaghtened,
• straighterned,
• straghtener,
• straightenr,
• streightener,
• streightner,
• streichtener

• straight flush,
• straight razor,
• straight line,
• straight ticket,
• straight hang,
• straightlaced,
• straightjacket,
• straight-arm,
• straight man,
• straughter,
• straight-laced,
• Stracener,
• straighten,
• straightarrow,
• star sign,
• stargazing,
• straight sinus,
• straight angle,
• straightaway,
• straightway,
• straight flute,
• straightedge,
• straggler,
• straight chain,
• straight chair,
• straight pin,
• straight poker,
• straightforward,
• straight arch,
• straight person,
• straighten up,
• straighten out,
• straight off,
• straight-out,
• straightness,
• straight arrow,
• straight face,
• straight-backed.

The adjective form of the word "straightener" is "straightening".

The plural of the "straightener" can be the "straighteners".

The singular of the "straightener" can be the "straightener".