12-Letter Words Matching ___L_R______

There are 20 12-letter words that match ___L_R______. 8 are common words, such as BOILERMAKERS and BOILERPLATES. A rarer one is TELLUROMETER. In this set, I is the most frequent open letter (17 words). 9 words contain a doubled letter.

Full list 20

boilermakersboilerplatesdeclarationsefflorescentexplorationsinflorescentingloriouslyjailbreakingachlorhydriaballyraggingbullyraggingcholericallyefflorescinghellgrammiteachlorhydricanglerfishesdeflorationsgallerygoersmilliradianstellurometer

About this list

Words
20 (8 common words)
Common example
boilermakers
Rare example
tellurometer
Doubled letters
9
Ending in S
8
Most frequent letter
I (17)

Questions

How many 12-letter words matching ___l_r______ are there?

20. 8 of them are common words.

What is a common example?

BOILERMAKERS is among the common words in this set.