8-Letter Words Matching ___E___X

There are 15 8-letter words that match ___E___X. 3 are common words, such as APPENDIX and CYBERSEX. A rarer one is VIDEOTEX. In this set, R is the most frequent open letter (11 words). 2 words contain a doubled letter.

Full list 15

appendixcybersexintermixinterrexintersexmirepoixmoneyboxsuperfixsupertaxaftertaxheretrixhomeoboxsupersexundertaxvideotex

About this list

Words
15 (3 common words)
Common example
appendix
Rare example
videotex
Doubled letters
2
Ending in S
0
Most frequent letter
R (11)

Questions

How many 8-letter words matching ___e___x are there?

15. 3 of them are common words.

What is a common example?

APPENDIX is among the common words in this set.