1. Inexpressible in words.

2. Ineffableness.

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

• inerrable,
• inevtable,
• innefable,
• ineffible,
• ineviable,
• uneffable,
• jneffable,
• kneffable,
• oneffable,
• 9neffable,
• 8neffable,
• ibeffable,
• imeffable,
• ijeffable,
• inffable,
• inefable,
• infefable,
• inaffable,
• ineffeble,
• imaffable

• ineffably.

The adjective form of the word "ineffable" is "ineffable".

The plural form of the word "ineffable" is "ineffables".

The singular form of the word "ineffable" is "ineffability"