15-Letter Words Matching ______ER_______

There are 54 15-letter words that match ______ER_______. 12 are common words, such as COLLATERALIZING and COMPUTERIZATION. A rarer one is UNCONCERNEDNESS. In this set, I is the most frequent open letter (49 words). 19 words contain a doubled letter.

Full list 54

Common words

collateralizingcomputerizationconsideratenessdisinheritancesdisinterestedlyinvulnerabilitymaneuverabilitymisinterpretingnongovernmentalnoninterferencenoninterventiontreacherousness
collateralizingcomputerizationconsideratenessdisinheritancesdisinterestedlyinvulnerabilitymaneuverabilitymisinterpretingnongovernmentalnoninterferencenoninterventiontreacherousnessanticlericalismimponderabilityintemperatenessinterferometersinterferometricinterpersonallymenispermaceousnonexperimentalnonintersectingodoriferousnesspestiferousnesspostoperativelyprointerventiontelethermometertergiversationstransferabilityuncooperativelyanticlericalistbouleversementscatheterizationchincherincheescholinergicallycollateralitiescommiseratinglycomputerphobiasdedifferentiatedomineeringnessfloriferousnessindifferentismsindifferentistsinterperceptualinterpermeatingintracerebrallyintraperitonealnonintercoursesoligomerizationphotoperiodismspreinterviewingrememberabilityretroperitonealunanswerabilityunconcernedness

About this list

Words
54 (12 common words)
Common example
collateralizing
Rare example
unconcernedness
Doubled letters
19
Ending in S
20
Most frequent letter
I (49)

Questions

How many 15-letter words matching ______er_______ are there?

54. 12 of them are common words.

What is a common example?

COLLATERALIZING is among the common words in this set.