13-Letter Words Matching ______M_____S

There are 99 13-letter words that match ______M_____S. 25 are common words, such as AMALGAMATIONS and ANATHEMATIZES. A rarer one is UNDEREMPHASES. In this set, I is the most frequent open letter (81 words). 18 words contain a doubled letter.

Full list 99

Common words

amalgamationsanathematizesantisemitismsconfirmationsconformationsconglomeratesconsummationsdiscriminatesdisharmoniousexperimentersinflammationsinstrumentals
amalgamationsanathematizesantisemitismsconfirmationsconformationsconglomeratesconsummationsdiscriminatesdisharmoniousexperimentersinflammationsinstrumentalskleptomaniacslegitimatizesmalformationsmegalomaniacsminicomputersnymphomaniacsproclamationsprogrammablessanctimoniousschoolmasterssubcommitteestelecommutersunceremoniousactinomycetesactinomycosesactinomycosisanthelminticsantifeminismsantifeministscalorimetriescopolymerizescostermongersdichlamydeousdiscriminantsgyrocompassesharbormasterspsychometricspsychometriesthermometriesunderemphasisuniformnessesactinometriesalkalimetriesantihumanismsantiromanticsaxisymmetriesbibliomaniacsblastomycosesblastomycosischronometriescolorimetriesconfirmednesscraniometriescytomembranesdepolymerizesdesquamationsdichromatismsdilatometriesdisclamationsdisharmonizesdissymmetriesdynamometriesendosymbiontsendosymbiosesendosymbiosisfluorimetriesfluorometriesgossipmongersgynecomastiaslegitimationslymphomatoseslymphomatosismedicamentousmetasomatismsmorphometriesnoncommunistsoneiromanciesperformativesphillumenistsphrasemakingsphrasemongerspolarimetriespreformationspreformulatespseudomonadesreassemblagesreassumptionsrhabdomancersrhabdomanciesseismometriesstichomythiasstichomythiessupplementalssupplementerstensiometriestransaminasesunderemphases

About this list

Words
99 (25 common words)
Common example
amalgamations
Rare example
underemphases
Doubled letters
18
Ending in S
99
Most frequent letter
I (81)

Questions

How many 13-letter words matching ______m_____s are there?

99. 25 of them are common words.

What is a common example?

AMALGAMATIONS is among the common words in this set.