15-Letter Words Ending in DES

There are 20 15-letter words that end in DES. 2 are common words, such as POLIOMYELITIDES and VERISIMILITUDES. A rarer one is TRICHOMONACIDES. In this set, I is the most frequent open letter (18 words). 2 words contain a doubled letter.

Full list 20

poliomyelitidesverisimilitudeschlorothiazidescholecystitidesmonosaccharidesosteomyelitidespolysaccharideschlorpropamidesfibrinopeptidesglutaraldehydesglyceraldehydesinterelectrodesmicroelectrodesmononucleotidesplatinocyanidespolyacrylamidespolynucleotidesribonucleosidesribonucleotidestrichomonacides

About this list

Words
20 (2 common words)
Common example
poliomyelitides
Rare example
trichomonacides
Doubled letters
2
Ending in S
20
Most frequent letter
I (18)

Questions

How many 15-letter words ending in des are there?

20. 2 of them are common words.

What is a common example?

POLIOMYELITIDES is among the common words in this set.