Some words with E in the middle are:
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Words with IE in the middle:dieddiesdietliedliespierpiespriesttiedtierties
Four letter words with o e in the middle are: coeddoerdoesfoesgoergoeshoedhoerhoesJoeljoesjoeykoelnoelnoespoempoetroestoeatoedtoesvoeswoeszoea
Jeep
den hen ten let bet net her
Agree, barge, carve, curse, curve, eerie, farce, force, gorge, large and merge are 5 letter words with R in the middle and e at the end. Additional words include nerve, nurse, purge, purse, serve, surge, terse, three, verse and worse.