12-Letter Words Matching ______SP____

There are 21 12-letter words that match ______SP____. 4 are common words, such as DOUBLESPEAKS and FRONTISPIECE. A rarer one is UREDIOSPORES. 4 words contain a doubled letter.

Full list 21

doublespeaksfrontispiecemarlinspikesstratospherearthrosporesblastospherecentrospherechromosphereclothespressgroundspeedsthermosphereblastosporescotransportsletterspacesmonodispersenonphosphateoverrespondspolydisperseposthospitaltriphosphateurediospores

About this list

Words
21 (4 common words)
Common example
doublespeaks
Rare example
urediospores
Doubled letters
4
Ending in S
10

Questions

How many 12-letter words matching ______sp____ are there?

21. 4 of them are common words.

What is a common example?

DOUBLESPEAKS is among the common words in this set.