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

The most common answer is onrush (6 letters).

Crossword clue: another word for attack

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

onrush 6 letters gen-syn

(military) an offensive against an enemy (using weapons)

onslaught 9 letters gen-syn

(military) an offensive against an enemy (using weapons)

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