15-Letter Words Matching ________P_____S

There are 18 15-letter words that match ________P_____S. 5 are common words, such as ANTIPERSPIRANTS and BUSINESSPERSONS. A rarer one is PROTOPORPHYRINS. 3 words contain a doubled letter.

Full list 18

antiperspirantsbusinesspersonsclaustrophobiascongresspersonsmisappropriatesachondroplasiasanthropophagousmercaptopurinesmyelencephalonsnorepinephrinesanthropophagiesantimonopolistsbacteriophagiesbrachycephalieschlorpropamidescomputerphobiashydroxyapatitesprotoporphyrins

About this list

Words
18 (5 common words)
Common example
antiperspirants
Rare example
protoporphyrins
Doubled letters
3
Ending in S
18

Questions

How many 15-letter words matching ________p_____s are there?

18. 5 of them are common words.

What is a common example?

ANTIPERSPIRANTS is among the common words in this set.