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

The most common answer is diminish (8 letters).

Crossword clue: another word for decrease

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

diminish 8 letters gen-syn

decrease in size, extent, or range

lessen 6 letters gen-syn

decrease in size, extent, or range

lessening 9 letters gen-syn

a change downward

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