communicator
bargainer
compromiser
go-between
holdout
intercessor
intermediary
intermediator
mediator
negotiatress
negotiatrix
representative
settler
Demeter
Peter
beater
cheater
depleter
dieter
eater
heater
kilometre
liter
meter
metre
neater
peter
praetor
repeater
seater
skeeter
sweeter
teeter
teter