- extra
- extracellular
- extract
- extractable
- extraction
- extractive
- extractor
- extracurricular
- extraditable
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- extradition
- extragalactic
- extrajudicial
- extralegal
- extralinguistic
- extramarital
- extramural
- extraneous
- extraordinaire
- extraordinary
- extrapolate
- extrapolation
- extrasensory
- extrasolar
- extraterrestrial
- extraterritorial
- extraterritoriality
- extravagance
- extravagant
- extravaganza
- extravehicular
- extravert
- extrema
- extremal
- extreme
- extremism
- extremist
- extremity
- extricable
- extricate
- extrication
- extrinsic
- extroversion
- extrovert
- extrude
- extrusion
- extrusive