13-Letter Words Matching __SI_________

There are 54 13-letter words that match __SI_________. 29 are common words, such as ASSIDUOUSNESS and ASSIMILATIONS. A rarer one is VISIBLENESSES. In this set, I is the most frequent open letter (50 words). 20 words contain a doubled letter.

Full list 54

Common words

assiduousnessassimilationsbusinesswomanbusinesswomencosignatoriesdesirablenessdisillusioneddisinfectantsdisinfectionsdisinflationsdisinheritingdisintegrated
assiduousnessassimilationsbusinesswomanbusinesswomencosignatoriesdesirablenessdisillusioneddisinfectantsdisinfectionsdisinflationsdisinheritingdisintegrateddisintegratesdisinteresteddisintermentsdisinvestmentinsidiousnessinsignificantinsinceritiesmisidentifiedmisidentifiesmisinterpretsmusicianshipsmusicologicalmusicologistsossificationspusillanimitypusillanimousunsightlinessassignabilitybasidiomycetebasidiosporesdisincentivesdisintegratorinsinuatinglyinsipidnessesmisimpressionresidentiallyvisionarinessassistantshipbasificationsdesiderationsdisinfestantsdisinhibitingdisinhibitiondisintoxicateeosinophiliasgasificationsipsilaterallyresistibilityresistivenessresistivitiesvesiculationsvisiblenesses

About this list

Words
54 (29 common words)
Common example
assiduousness
Rare example
visiblenesses
Doubled letters
20
Ending in S
31
Most frequent letter
I (50)

Questions

How many 13-letter words matching __si_________ are there?

54. 29 of them are common words.

What is a common example?

ASSIDUOUSNESS is among the common words in this set.