Fuel
duet
duel
cued
suet
sued
dues
cues
aver, ever, over
Four letter words with o e in the middle are: coeddoerdoesfoesgoergoeshoedhoerhoesJoeljoesjoeykoelnoelnoespoempoetroestoeatoedtoesvoeswoeszoea
Trend
beach
see see
Jeep
it can be in the beginning, middle or end of a word
continue
4 because in word perseverance we have 4 letters E
fete
Earn
Three? these theme