How many 7-letter words are there?

23,109 in the Tournament dictionary, which is the public-domain ENABLE word list. The Broad dictionary adds more.

What is the highest-scoring 7-letter word?

ZYZZYVA at 43 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.

23,109 words are exactly 7 letters long. ZYZZYVA scores highest at 43 points.

Showing the highest-scoring of 23,109 words. The pages linked below split the rest into smaller lists.

There are 23,109 7-letter words in the Tournament dictionary. The highest scoring are listed below.

Most of the answers cluster at 7 letters, where there are 23,109. Only 23,109 reach the full 7.

ZYZZYVA at 43 points is the best Scrabble score available here. It tops both tables: 42 in Words With Friends as well.

ZYZZYVA, PIZAZZY and JAZZILY reach 7 letters — the ceiling for this query.

Each word links to nothing and copies on click — the list is meant to be scanned, then used.

jazzman: a musician who plays or composes jazz music
quizzer: someone who administers a test to determine your qualifications
frizzly: (of hair) in small tight curls
mezuzah: religious texts from Deuteronomy inscribed on parchment and rolled up in a case that is attached to the doorframe of many Jewish households…
dizzily: in a giddy light-headed manner

How many 7-letter words are there?: 23,109 in the Tournament dictionary, which is the public-domain ENABLE word list. The Broad dictionary adds more.
What is the highest-scoring 7-letter word?: ZYZZYVA at 43 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.