How many letters does the top answer for “the social process whereby cities grow and societies become more urban” have?

The most common answer is urbanisation (12 letters).

Crossword clue: the social process whereby cities grow and societies become more urban

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

urbanisation 12 letters wn-def

the social process whereby cities grow and societies become more urban

urbanization 12 letters wn-def

the social process whereby cities grow and societies become more urban