How many letters does the top answer for “of or pertaining to fever; feverish.” have?

The most common answer is pyrexial (8 letters).

Crossword clue: of or pertaining to fever; feverish.

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

pyrexial 8 letters web-def

Of or pertaining to fever; feverish.

pyrexical 9 letters web-def

Of or pertaining to fever; feverish.

of or pertaining to fever; febrile. 50% similar → pyretic