11-Letter Words Matching ________S_A

There are 15 11-letter words that match ________S_A. 2 are common words, such as ANAESTHESIA and FASHIONISTA. A rarer one is PLASMODESMA. In this set, I is the most frequent open letter (14 words). 1 words contain a doubled letter.

Full list 15

anaesthesiafashionistaantonomasiacenesthesiahemianopsiahyperplasiahypesthesiaidioglossiakinesthesiaparesthesiaparonomasiasynesthesiatelesthesiahypermnesiaplasmodesma

About this list

Words
15 (2 common words)
Common example
anaesthesia
Rare example
plasmodesma
Doubled letters
1
Ending in S
0
Most frequent letter
I (14)

Questions

How many 11-letter words matching ________s_a are there?

15. 2 of them are common words.

What is a common example?

ANAESTHESIA is among the common words in this set.