7-Letter Words Matching __X_O__

There are 12 7-letter words that match __X_O__. 9 are common words, such as ANXIOUS and BOXWOOD. A rarer one is WAXWORM. In this set, S is the most frequent open letter (6 words). 2 words contain a doubled letter.

Full list 12

anxiousboxwoodcoxcombfoxholenoxioussexpotssextonssixfoldwaxworkboxroomsaxhornwaxworm

About this list

Words
12 (9 common words)
Common example
anxious
Rare example
waxworm
Doubled letters
2
Ending in S
4
Most frequent letter
S (6)

Questions

How many 7-letter words matching __x_o__ are there?

12. 9 of them are common words.

What is a common example?

ANXIOUS is among the common words in this set.