12-Letter Words Matching ________N_N_

There are 90 12-letter words that match ________N_N_. 33 are common words, such as APPERTAINING and APPORTIONING. A rarer one is UNDERRUNNING. In this set, I is the most frequent open letter (86 words). 26 words contain a doubled letter.

Full list 90

Common words

appertainingapportioningascertainingcaparisoningconditioningconstrainingcontraveningdiscipliningdisincliningenlighteningentertainingguillotining
appertainingapportioningascertainingcaparisoningconditioningconstrainingcontraveningdiscipliningdisincliningenlighteningentertainingguillotininghoneymooninghydroplaningintertwiningmisgoverningnonfatteningnonmalignantpartitioningpredestiningpreordainingprizewinningprovisioningquarantiningreconsigningreexplainingrefashioningresharpeningstreamliningsubcontinenttrampoliningunderpinningundersigningaccessioningdiscriminantafterburningbenzophenonecarrageenansdimensioningdisburdeningdisciplinantencrimsoningheartburningheterodyninghydrastininehydroquinonemisdemeanantmisdemeaningnonpermanentprescreeningsupereminentundiscerninganthocyaninsantifemininebreadwinningcarillonningcarrageeninschairmanningcocaptainingcompanioningensanguiningforetokeningimpassioningmisbeginningmisbuttoningmisreckoningnonhappeningoutdesigningovercleaningoverdominantoverlearningoverplanningovertrainingphycocyaninspreassigningpremalignantprevisioningrataplanningreenthroningrefresheningremoisteningrepatterningretighteningsemidominantsubcomponentsunscreeningsuspicioningtruncheoningturpentiningunderrunning

About this list

Words
90 (33 common words)
Common example
appertaining
Rare example
underrunning
Doubled letters
26
Ending in S
4
Most frequent letter
I (86)

Questions

How many 12-letter words matching ________n_n_ are there?

90. 33 of them are common words.

What is a common example?

APPERTAINING is among the common words in this set.