15-Letter Words Matching M_________S____

There are 16 15-letter words that match M_________S____. 8 are common words, such as MEANINGLESSNESS and MELLIFLUOUSNESS. A rarer one is MOUNTAINOUSNESS. In this set, E is the most frequent open letter (15 words). 12 words contain a doubled letter.

Full list 16

meaninglessnessmellifluousnessmeritoriousnessmicroaggressionmicroprocessorsmischievousnessmultiprocessingmultiprocessorsmagnanimousnessmeasurelessnessmetalinguisticsmedulloblastomamicropublishersmicropublishingmononucleosisesmountainousness

About this list

Words
16 (8 common words)
Common example
meaninglessness
Rare example
mountainousness
Doubled letters
12
Ending in S
12
Most frequent letter
E (15)

Questions

How many 15-letter words matching m_________s____ are there?

16. 8 of them are common words.

What is a common example?

MEANINGLESSNESS is among the common words in this set.