13-Letter Words Matching _________ID__

There are 34 13-letter words that match _________ID__. 3 are common words, such as MOUNTAINSIDES and PHARYNGITIDES. A rarer one is TONSILLITIDES. In this set, S is the most frequent open letter (32 words). 9 words contain a doubled letter.

Full list 34

Common words

mountainsidespharyngitidestriglyceridesblepharitidesdisaccharidesferricyanidesferrocyanidesmastoiditidessupercolliderchalcogenidescounterraidedcrystalloidal
mountainsidespharyngitidestriglyceridesblepharitidesdisaccharidesferricyanidesferrocyanidesmastoiditidessupercolliderchalcogenidescounterraidedcrystalloidaldinucleotidesendoperoxidesglutethimidesglycopeptideshyperboloidalmethysergidesmolluscicidalmolluscicidesneuropeptidesnicotinamidesparasiticidalparasiticidespentapeptidesperiostitidesperitonitidespneumonitidesprostatitidesradionuclidessalpingitidesspondylitidesthyroiditidestonsillitides

About this list

Words
34 (3 common words)
Common example
mountainsides
Rare example
tonsillitides
Doubled letters
9
Ending in S
28
Most frequent letter
S (32)

Questions

How many 13-letter words matching _________id__ are there?

34. 3 of them are common words.

What is a common example?

MOUNTAINSIDES is among the common words in this set.