15-Letter Words Matching _________S__I__

There are 20 15-letter words that match _________S__I__. 2 are common words, such as OVEREMPHASIZING and SUPERIMPOSITION. A rarer one is SYNCHRONISATION. 2 words contain a doubled letter.

Full list 20

overemphasizingsuperimpositionelectropositiveanfractuositiescytochemistriesextemporisationexternalisationhyperparasitismhypomagnesemiasimpecuniositiesinterlacustrinemicroporositiesnonprofessorialnonuniversitiesoverdiversitiesoverintensitiespsychophysicistsemiterrestrialsuperparasitismsynchronisation

About this list

Words
20 (2 common words)
Common example
overemphasizing
Rare example
synchronisation
Doubled letters
2
Ending in S
8

Questions

How many 15-letter words matching _________s__i__ are there?

20. 2 of them are common words.

What is a common example?

OVEREMPHASIZING is among the common words in this set.