1. The state or quality of being straight.

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

• straightners,
• straightned,
• straightner,
• straigtners,
• atraightness,
• ztraightness,
• xtraightness,
• dtraightness,
• etraightness,
• wtraightness,
• srraightness,
• sfraightness,
• strightness,
• straghtness,
• straigtness,
• straihgtness,
• straigthness,
• streightness,
• strearkiness,
• straighnters

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

The adjective form of the word "straightness" is "straight".

The plural of the "straightness" can be the "straightnesses".

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