1. One who or that which threads.

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

• thereaders,
• theaded,
• thrayer,
• threater,
• thereafer,
• threafter,
• thender,
• theader,
• threather,
• threates,
• threar,
• theador,
• shreader,
• ereader,
• threded,
• tireder,
• threade,
• threaters,
• threate,
• threer

• toreador,
• threadworm.

The adjective form of the word "threader" is "threading".

The plural of the "threader" can be the "threaders".

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