How many letters does the top answer for “one of the classes of echinoderms.” have?

The most common answer is holothurioidea (14 letters).

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Crossword clue: one of the classes of echinoderms.

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

holothurioidea 14 letters web-def

One of the classes of echinoderms.

Pattern

one of the classes of vertebrates. 50% similar → amphibia

Data: SCOWL, igerman98, RLA-ES, Grammalecte, br.ispell · frequency: OpenSubtitles (see Data & licenses)