10-Letter Words Matching _____T___M

There are 14 10-letter words that match _____T___M. 5 are common words, such as DOWNSTREAM and MAINSTREAM. A rarer one is SUBOPTIMUM. In this set, E is the most frequent open letter (11 words). 2 words contain a doubled letter.

Full list 14

downstreammainstreammillstreampromethiumslipstreamabsinthismapophthegmbelletrismheadstreamhomeothermhypanthiumsidestreamstenothermsuboptimum

About this list

Words
14 (5 common words)
Common example
downstream
Rare example
suboptimum
Doubled letters
2
Ending in S
0
Most frequent letter
E (11)

Questions

How many 10-letter words matching _____t___m are there?

14. 5 of them are common words.

What is a common example?

DOWNSTREAM is among the common words in this set.