13-Letter Words Matching _M________O__

There are 20 13-letter words that match _M________O__. 10 are common words, such as AMALGAMATIONS and AMELIORATIONS. A rarer one is UMBILICATIONS. In this set, S is the most frequent open letter (20 words). 3 words contain a doubled letter.

Full list 20

amalgamationsameliorationsamortizationsemancipationsemasculationsimmunizationsimperfectionsimpersonatorsimplantationsimpregnationsimmoderationsimprovisatoryumbelliferousemarginationsembolizationsemphysematousimprovisatoreimprovisatoriimprovisatorsumbilications

About this list

Words
20 (10 common words)
Common example
amalgamations
Rare example
umbilications
Doubled letters
3
Ending in S
17
Most frequent letter
S (20)

Questions

How many 13-letter words matching _m________o__ are there?

20. 10 of them are common words.

What is a common example?

AMALGAMATIONS is among the common words in this set.