6 letter words:
runner6,
5 letter words:
enure5,
renne5,
rerun5,
4 letter words:
erne4,
nene4,
nurr4,
reen4,
ruer4,
rune4,
3 letter words:
een3,
ene3,
ere3,
ern3,
err3,
nee3,
nun3,
nur3,
ree3,
ren3,
rue3,
run3,
ure3,
urn3,
2 letter words:
ee2,
en2,
er2,
ne2,
nu2,
re2,
un2,
ur2,