How many letters does the top answer for “make a loud resonant noise” have?

The most common answer is clangour (8 letters).

Crossword clue: make a loud resonant noise

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

clangour 8 letters wn-def

a loud resonant repeating noise

make a loud noise 75% similar → clang, clangor, toot

a loud resonant repeating noise 60% similar → clang, clangor, clangoring

to make a loud or shrill noise. golding. 50% similar → clary