13-Letter Words Matching A_______M____

There are 20 13-letter words that match A_______M____. 6 are common words, such as ACCOUTERMENTS and ACCOUTREMENTS. A rarer one is ARSPHENAMINES. 8 words contain a doubled letter.

Full list 20

accoutermentsaccoutrementsadmonishmentsannouncementsantispasmodicastonishmentsaccelerometeraccouchementsadiathermancyaerodynamicalaggiornamentoalcoholometeralectryomancyanthropometryaggrievementsanthropomorphantirheumaticantithrombinsappraisementsarsphenamines

About this list

Words
20 (6 common words)
Common example
accouterments
Rare example
arsphenamines
Doubled letters
8
Ending in S
10

Questions

How many 13-letter words matching a_______m____ are there?

20. 6 of them are common words.

What is a common example?

ACCOUTERMENTS is among the common words in this set.