10-Letter Words Matching _____T_M__

There are 33 10-letter words that match _____T_M__. 9 are common words, such as ACCUSTOMED and ARRHYTHMIA. A rarer one is SUBOPTIMUM. In this set, I is the most frequent open letter (27 words). 5 words contain a doubled letter.

Full list 33

Common words

accustomedarrhythmiaarrhythmicaspartamesflexitimeslunchtimesnighttimesoftentimespeacetimestimestampsdermatomeseurhythmic
accustomedarrhythmiaarrhythmicaspartamesflexitimeslunchtimesnighttimesoftentimespeacetimestimestampsdermatomeseurhythmicmicrotomesmonoatomicpentatomicpentstemonperistomespolyatomicprovitaminsmalltimersuboptimaltetratomicunrhythmicaftertimescyclotomicdermatomaldreamtimeshypostomesimpostumesnonoptimalpenultimaspostatomicsuboptimum

About this list

Words
33 (9 common words)
Common example
accustomed
Rare example
suboptimum
Doubled letters
5
Ending in S
15
Most frequent letter
I (27)

Questions

How many 10-letter words matching _____t_m__ are there?

33. 9 of them are common words.

What is a common example?

ACCUSTOMED is among the common words in this set.