12-Letter Words Matching T_____P_____

There are 19 12-letter words that match T_____P_____. 4 are common words, such as THEOSOPHICAL and THEOSOPHISTS. A rarer one is TRYPTOPHANES. In this set, O is the most frequent open letter (18 words). 3 words contain a doubled letter.

Full list 19

theosophicaltheosophiststradespeopletropospherestechnophilestechnophobestechnophobiatechnophobicthallophytesthermophilesthermophilictrainspottertroposphericthallophytictribespeopletrichopterantriglyphicaltrochophorestryptophanes

About this list

Words
19 (4 common words)
Common example
theosophical
Rare example
tryptophanes
Doubled letters
3
Ending in S
8
Most frequent letter
O (18)

Questions

How many 12-letter words matching t_____p_____ are there?

19. 4 of them are common words.

What is a common example?

THEOSOPHICAL is among the common words in this set.