15-Letter Words Matching ___T___A_______

There are 16 15-letter words that match ___T___A_______. 2 are common words, such as INSTANTANEOUSLY and PRETERNATURALLY. A rarer one is SUBTERRANEOUSLY. 9 words contain a doubled letter.

Full list 16

instantaneouslypreternaturallycontravallationoxytetracyclinephotoelasticityphototransistorgentlemanlinessinstantaneitiesphotogrammetricphytoflagellatephytoplanktonicpictorialnessesplutocraticallypostdevaluationpostirradiationsubterraneously

About this list

Words
16 (2 common words)
Common example
instantaneously
Rare example
subterraneously
Doubled letters
9
Ending in S
3

Questions

How many 15-letter words matching ___t___a_______ are there?

16. 2 of them are common words.

What is a common example?

INSTANTANEOUSLY is among the common words in this set.