How many letters does the top answer for “having the same essence; being identically of the same nature. cudworth.” have?

The most common answer is tautoousian (11 letters).

Crossword clue: having the same essence; being identically of the same nature. cudworth.

2 answers found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

tautoousian 11 letters web-def

Having the same essence; being identically of the same nature. [R.] Cudworth.

tautoousious 12 letters web-def

Having the same essence; being identically of the same nature. [R.] Cudworth.