15-Letter Words Matching ________DE_____

There are 18 15-letter words that match ________DE_____. 3 are common words, such as LEVELHEADEDNESS and UNDERHANDEDNESS. A rarer one is SWELLHEADEDNESS. In this set, A is the most frequent open letter (18 words). 8 words contain a doubled letter.

Full list 18

levelheadednessunderhandednesswrongheadednessbroadmindednessjurisprudentiallightheadednessnonconfidentialsimplicidentatesinistrodextraltranscendenciesclearheadednessglutaraldehydesglyceraldehydesprepresidentialroundheadednessstadtholderatesstadtholdershipswellheadedness

About this list

Words
18 (3 common words)
Common example
levelheadedness
Rare example
swellheadedness
Doubled letters
8
Ending in S
12
Most frequent letter
A (18)

Questions

How many 15-letter words matching ________de_____ are there?

18. 3 of them are common words.

What is a common example?

LEVELHEADEDNESS is among the common words in this set.