How many letters does the top answer for “a natural disposition to be hostile” have?

The most common answer is belligerence (12 letters).

Crossword clue: a natural disposition to be hostile

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

belligerence 12 letters wn-def

a natural disposition to be hostile

pugnacity 9 letters wn-def

a natural disposition to be hostile

a natural disposition to fight 50% similar → bellicoseness, bellicosity