15-Letter Words Matching _EF____________

There are 16 15-letter words that match _EF____________. 4 are common words, such as DEFECTIVENESSES and DEFENSELESSNESS. A rarer one is REFUNDABILITIES. 7 words contain a doubled letter.

Full list 16

defectivenessesdefenselessnessdefensivenessesnefariousnessesdefibrillationsreflexivenessesdefeasibilitiesdefeminizationsdefenestrationsdefensibilitiesreflectometriesreformabilitiesrefortificationrefractometriesrefrangiblenessrefundabilities

About this list

Words
16 (4 common words)
Common example
defectivenesses
Rare example
refundabilities
Doubled letters
7
Ending in S
15

Questions

How many 15-letter words matching _ef____________ are there?

16. 4 of them are common words.

What is a common example?

DEFECTIVENESSES is among the common words in this set.