15-Letter Words Matching __T_________N__

There are 21 15-letter words that match __T_________N__. 4 are common words, such as ANTIDEPRESSANTS and ANTIPERSPIRANTS. A rarer one is ULTRAMARATHONER. 3 words contain a doubled letter.

Full list 21

antidepressantsantiperspirantsinterdependencenitroglycerinesinterdependencyinterrogationalanticonvulsantsantieducationalantiferromagnetantimanagementsantitraditionalenterogastronesextinguishmentsinterdivisionalinterelectronicintertwinementsintrospectionalmethoxyfluranesmethylxanthinesphthalocyaninesultramarathoner

About this list

Words
21 (4 common words)
Common example
antidepressants
Rare example
ultramarathoner
Doubled letters
3
Ending in S
11

Questions

How many 15-letter words matching __t_________n__ are there?

21. 4 of them are common words.

What is a common example?

ANTIDEPRESSANTS is among the common words in this set.