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14-Letter Words Start with 'ext'

There are 18 14-letter words that start with 'ext'.

extemporaneity extemporaneous
extendednesses extensionality
exterminations extinguishable
extinguishment extortionately
extracorporeal extractability
extraembryonic extraneousness
extraordinaire extrapolations
extrapyramidal extravagancies
extravasations extravehicular

Note: These 18 14-letter words that start with 'ext' are found from the USA & Canada version of the tournament Scrabble word list.