13-Letter Words Matching ____D_O______

There are 18 13-letter words that match ____D_O______. 9 are common words, such as ASSIDUOUSNESS and DEHYDROGENATE. A rarer one is SPEEDBOATINGS. In this set, E is the most frequent open letter (17 words). 9 words contain a doubled letter.

Full list 18

assiduousnessdehydrogenategrandiositiesgrandmotherlyinsidiousnessinvidiousnessmaladroitnessmelodiousnessnamedroppingsbasidiomycetebasidiosporesconidiophoresdeciduousnessdehydrogenasegrandiosenessbreadboardingchondrocraniaspeedboatings

About this list

Words
18 (9 common words)
Common example
assiduousness
Rare example
speedboatings
Doubled letters
9
Ending in S
12
Most frequent letter
E (17)

Questions

How many 13-letter words matching ____d_o______ are there?

18. 9 of them are common words.

What is a common example?

ASSIDUOUSNESS is among the common words in this set.