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

The most common answer is receptiveness (13 letters).

Crossword clue: another word for openness

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

receptiveness 13 letters gen-syn

willingness or readiness to receive (especially impressions or ideas)

receptivity 11 letters gen-syn

willingness or readiness to receive (especially impressions or ideas)

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