E1X8T1E1R1M3I1N1A1T1E1
20 points
EXTERMINATE is validvalid
[v EXTERMINATED, EXTERMINATES, EXTERMINATING] : EXTERMINATION [n], EXTERMINATOR [n]
to get rid of completely usually by killing off, also EXTERMINE [v EXTERMINATED, EXTERMINATING, EXTERMINATES]