12-Letter Words Matching _S_I________

There are 15 12-letter words that match _S_I________. 7 are common words, such as ASSIGNATIONS and ASSIMILATING. A rarer one is ESPIEGLERIES. 12 words contain a doubled letter.

Full list 15

assignationsassimilatingassimilationastigmatismsoscillationsoscilloscopeossificationaspirationalassibilatingassimilativeassimilatoryoscillogramsoscillographassimilatorsespiegleries

About this list

Words
15 (7 common words)
Common example
assignations
Rare example
espiegleries
Doubled letters
12
Ending in S
6

Questions

How many 12-letter words matching _s_i________ are there?

15. 7 of them are common words.

What is a common example?

ASSIGNATIONS is among the common words in this set.