How many letters does the top answer for “having a tail or taillike appendage” have?

The most common answer is caudate (7 letters).

Crossword clue: having a tail or taillike appendage

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

caudate 7 letters wn-def

amphibians that resemble lizards

caudated 8 letters wn-def

having a tail or taillike appendage

lacking a tail or taillike appendage 60% similar → acaudal, acaudate