12-Letter Words Matching __EF________

There are 18 12-letter words that match __EF________. 9 are common words, such as COEFFICIENTS and INEFFABILITY. A rarer one is PREFORMULATE. 12 words contain a doubled letter.

Full list 18

coefficientsineffabilityinefficaciesinefficiencyprefabricatepreferentialruefulnessesusefulnesseswoefulnessesineffaceableprefectorialineffaceablyinefficientsprefinancingprefocussingpreformationpreformattedpreformulate

About this list

Words
18 (9 common words)
Common example
coefficients
Rare example
preformulate
Doubled letters
12
Ending in S
6

Questions

How many 12-letter words matching __ef________ are there?

18. 9 of them are common words.

What is a common example?

COEFFICIENTS is among the common words in this set.