11-Letter Words Ending in OID

There are 20 11-letter words that end in OID. 3 are common words, such as HYPOTHYROID and PARATHYROID. A rarer one is TUBERCULOID. In this set, R is the most frequent open letter (15 words). 3 words contain a doubled letter.

Full list 20

hypothyroidparathyroidparatyphoidantherozoidcrystalloiderysipeloidhyperboloidhypocycloidscarabaeoidscorpaenoidvaricelloidantithyroidantityphoidcannabinoiddiphtheroidepithelioidheteroploidhypodiploidketosteroidtuberculoid

About this list

Words
20 (3 common words)
Common example
hypothyroid
Rare example
tuberculoid
Doubled letters
3
Ending in S
0
Most frequent letter
R (15)

Questions

How many 11-letter words ending in oid are there?

20. 3 of them are common words.

What is a common example?

HYPOTHYROID is among the common words in this set.