-athon-athon /əθən $ əθɑːn/ suffix [in nouns] 
an event in which a particular thing is done for a very long time, especially to collect money: 
a swimathon
an event in which a particular thing is done for a very long time, especially to collect money: a swimathon- extradite
- extradition
- extrajudicial
- extramarital
- extramural
- extraneous
- extranet
- extraordinaire
- extraordinarily
- extraordinary
- extraordinary rendition
- extrapolate
- extrapolation
- extra-sensory perception
- extraterrestrial
- extraterritorial
- extra time
- extravagance
- extravagant
- extravagantly
- extravaganza
- extravert
- extra virgin
- extreme
- extreme fighting