How many letters does the top answer for “the cardinal compass point that is at 180 degrees” have?

The most common answer is southward (9 letters).

Crossword clue: the cardinal compass point that is at 180 degrees

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

southward 9 letters wn-def

toward the south

the cardinal compass point that is a 270 degrees 100% similar → westward

the cardinal compass point that is at 90 degrees 100% similar → east, eastward