1. One who gains profit, interest, &c.

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

• gaing,
• gaind,
• hainger,
• garnerd,
• giner,
• gigner,
• againe,
• ginea,
• govner,
• gaher,
• ginen,
• gaineed,
• gaini,
• raineer,
• gainin,
• gaine,
• cacner,
• geine,
• gainan,
• gonner

• gone,
• gunner,
• gain,
• Gains,
• cane,
• gander,
• Genie,
• guinea,
• mainer,
• gene,
• Gainor,
• ginger,
• Gained,
• Gaynor,
• gin.

The adjective form of the word "gainer" is "gaining".

The plural of the "gainer" can be the "gainers".

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