How many 6-letter words are there?

15,232 in the Tournament dictionary, which is the public-domain ENABLE word list. The Broad dictionary adds more.

What is the highest-scoring 6-letter word?

BEZAZZ at 35 points, counting tile values with no board multipliers.

No. The page shows the 300 highest-scoring; the pages linked below break the full list down by starting and ending letters.

15,232 words are exactly 6 letters long. BEZAZZ scores highest at 35 points.

Showing the highest-scoring of 15,232 words. The pages linked below split the rest into smaller lists.

Exactly 15,232 words in the dictionary run to 6 letters. The list starts with the ones that score best.

The results run from 6 letters up to 6, and the 6-letter group is the largest at 15,232 words.

For points rather than length, take BEZAZZ at 35 points. It tops both tables: 36 in Words With Friends as well.

Nothing here runs past 6 letters, where you will find BEZAZZ, PAZAZZ and PIZAZZ.

The related pages below slice this list more finely than one page usefully can.

How many 6-letter words are there?: 15,232 in the Tournament dictionary, which is the public-domain ENABLE word list. The Broad dictionary adds more.
What is the highest-scoring 6-letter word?: BEZAZZ at 35 points, counting tile values with no board multipliers.
Are all of them listed here?: No. The page shows the 300 highest-scoring; the pages linked below break the full list down by starting and ending letters.