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

The most common answer is offbeat (7 letters).

Crossword clue: another word for upbeat

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

offbeat 7 letters gen-syn

an unaccented beat (especially the last beat of a measure)

pollyannaish 12 letters gen-syn

pleasantly (even unrealistically) optimistic

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