14-Letter Words Starting With SEM

There are 13 14-letter words that start with SEM. 4 are common words, such as SEMIAUTOMATICS and SEMICONDUCTING. A rarer one is SEMPITERNITIES. In this set, I is the most frequent open letter (13 words). 5 words contain a doubled letter.

Full list 13

semiautomaticssemiconductingsemiconductorssemidarknessessemasiologicalsemicentennialsemiautonomoussemicommercialsemiofficiallysemiologicallysemiporcelainssemiretirementsempiternities

About this list

Words
13 (4 common words)
Common example
semiautomatics
Rare example
sempiternities
Doubled letters
5
Ending in S
6
Most frequent letter
I (13)

Questions

How many 14-letter words starting with sem are there?

13. 4 of them are common words.

What is a common example?

SEMIAUTOMATICS is among the common words in this set.