How many letters does the top answer for “another word for plonk” have?

The most common answer is flump (5 letters).

Crossword clue: another word for plonk

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

flump 5 letters gen-syn

set (something or oneself) down with or as if with a noise

plop 4 letters gen-syn

the noise of a rounded object dropping into a liquid without a splash

plunk 5 letters gen-syn

set (something or oneself) down with or as if with a noise

another word for about 50% similar → approximately, roughly, some

another word for terms 50% similar → footing

another word for under 50% similar → nether

another word for word 50% similar → phrase