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

The most common answer is empyrean (8 letters).

Crossword clue: another word for heavens

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

empyrean 8 letters gen-syn

the apparent surface of the imaginary sphere on which celestial bodies appear to be projected

firmament 9 letters gen-syn

the apparent surface of the imaginary sphere on which celestial bodies appear to be projected

welkin 6 letters gen-syn

the apparent surface of the imaginary sphere on which celestial bodies appear to be projected

another word for heaven 100% similar → paradise

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