12-Letter Words Matching ________AS__

There are 52 12-letter words that match ________AS__. 8 are common words, such as CATCHPHRASES and CHLOROPLASTS. A rarer one is WEATHERCASTS. In this set, S is the most frequent open letter (48 words). 2 words contain a doubled letter.

Full list 52

Common words

catchphraseschloroplastserysipelasesflabbergastsmilquetoastsoveremphasesoveremphasisrebroadcastsbilharziasesbilharziasischromoplastschrysoprases
catchphraseschloroplastserysipelasesflabbergastsmilquetoastsoveremphasesoveremphasisrebroadcastsbilharziasesbilharziasischromoplastschrysoprasesheteroplastyhistaminaseskeratoplastylymphoblastsnucleoplasmsplagioclasestrombidiasisuncinariasiscarboxylasescollagenasescytochalasindipeptidasesenterobiasesenterobiasisexonucleasesfascioliasesfascioliasisglucokinasesglucosidasesglutaminasesglycosidaseshydrogenaseshydroxylaseskinetoplastslecithinasesmegaloblastsmelanoblastsnitrogenasesodontoblastsphosphatasesprepurchasedprepurchasesspheroplastssuperorgasmstransferasestrophoblastsuncinariasesurolithiasesurolithiasisweathercasts

About this list

Words
52 (8 common words)
Common example
catchphrases
Rare example
weathercasts
Doubled letters
2
Ending in S
48
Most frequent letter
S (48)

Questions

How many 12-letter words matching ________as__ are there?

52. 8 of them are common words.

What is a common example?

CATCHPHRASES is among the common words in this set.