Vested
bested
Tested
Tester
pester
ester
Easter
aster
Faster
feaster
feasters
festers
fasters
This is one I don’t know what to do with – the official dictionary doesn’t allow ‘fasters’ (I tried it before my last word)… But I think it’s clearly a good word., I think we have to go by the official dictionary, though.
I thought I checked it, but you are correct. back to festers.
fester
fetter
Better
beater
Boater