13-Letter Words Containing EFF

There are 17 13-letter words that contain EFF. 7 are common words, such as EFFECTIVENESS and EFFERVESCENCE. A rarer one is NONEFFECTIVES. In this set, N is the most frequent open letter (15 words). 17 words contain a doubled letter.

Full list 17

effectivenesseffervescenceefficaciouslyefflorescenceineffectivelyineffectuallyinefficientlyeffectivitieseffectualnesseffectuationsinefficaciouscountereffortdieffenbachiaeffortfulnesshasenpfeffersineffablenessnoneffectives

About this list

Words
17 (7 common words)
Common example
effectiveness
Rare example
noneffectives
Doubled letters
17
Ending in S
9
Most frequent letter
N (15)

Questions

How many 13-letter words containing eff are there?

17. 7 of them are common words.

What is a common example?

EFFECTIVENESS is among the common words in this set.