12-Letter Words Matching P_________M_

There are 28 12-letter words that match P_________M_. 7 are common words, such as PANDEMONIUMS and PARALLELISMS. A rarer one is PROTOPHLOEMS. In this set, S is the most frequent open letter (27 words). 4 words contain a doubled letter.

Full list 28

Common words

pandemoniumsparallelismspaternalismspericardiumsplanetariumspointillismsproselytismsphysicalismspleochroismsprimitivismsprobabilismspastoralisms
pandemoniumsparallelismspaternalismspericardiumsplanetariumspointillismsproselytismsphysicalismspleochroismsprimitivismsprobabilismspastoralismspelargoniumspersonalismsphosphoniumsphotosystemspinealectomypittosporumsplebeianismspleinairismspodophyllumspolyglotismspolyribosomepositroniumspostvagotomyproctodaeumsprognathismsprotophloems

About this list

Words
28 (7 common words)
Common example
pandemoniums
Rare example
protophloems
Doubled letters
4
Ending in S
25
Most frequent letter
S (27)

Questions

How many 12-letter words matching p_________m_ are there?

28. 7 of them are common words.

What is a common example?

PANDEMONIUMS is among the common words in this set.