13-Letter Words Matching ________I___R

There are 12 13-letter words that match ________I___R. 1 are common words, such as UNDERACHIEVER and MALADMINISTER. A rarer one is ULTRAFAMILIAR. In this set, E is the most frequent open letter (11 words). 3 words contain a doubled letter.

Full list 12

underachievermaladministerrequisitionersuperachieverantiforeignerkapellmeisterphotofinishersuperenciphersuperministersuperthrillerthimbleriggerultrafamiliar

About this list

Words
12 (1 common words)
Common example
underachiever
Rare example
ultrafamiliar
Doubled letters
3
Ending in S
0
Most frequent letter
E (11)

Questions

How many 13-letter words matching ________i___r are there?

12. 1 of them are common words.

What is a common example?

UNDERACHIEVER is among the common words in this set.