1. Tenableness.

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

• desability,
• denyability,
• unability,
• innability,
• enability,
• anability,
• denability,
• bendablity,
• bnedability,
• brekability,
• tenablity,
• tenabilty,
• tenabillity,
• tenebility,
• Senability,
• vendiblity,
• wetabiltiy,
• wetabillity,
• obteinability,
• Rehability

The adjective form of the word "tenability" is "tenable".

The plural of the "tenability" can be the "tenabilities".

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