1. The act of trying for proof; the operation of refining large quantities of gold or silver by means of lead, in a test.

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

• testung,
• teting,
• tursting,
• tetsting,
• testong,
• testi,
• tresting,
• tsking,
• nessting,
• ttesting,
• testng,
• steting,
• desging,
• teading,
• tesiting,
• leasting,
• tosing,
• tusting,
• twsting,
• tessting

• tectonics,
• testiness,
• testimony,
• tectonic,
• Teston,
• tasting,
• Tustin,
• tectona,
• Testani.

The adverb form of the word "testing" is "testingly".

The adjective form of the word "testing" is "testable".

The plural of the "testing" can be the "testings".

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