How many letters does the top answer for “peace movement scientist” have?

The most common answer is hanh (4 letters).

Crossword clue: peace movement scientist

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

hanh 4 letters wd-fact-v3

peace scientist 67% similar → buddha

labor movement scientist 50% similar → perkins

reform movement scientist 50% similar → riis

social movement scientist 50% similar → skocpol