6 letter words:
arrack12,
racker12,
rerack12,
5 letter words:
acker11,
crake11,
creak11,
raker9,
areca7,
carer7,
crare7,
racer7,
arear5,
4 letter words:
keck14,
ekka12,
kaka12,
kark12,
cake10,
cark10,
rack10,
reck10,
arak8,
kara8,
rake8,
rark8,
reak8,
acer6,
acre6,
care6,
carr6,
raca6,
race6,
arar4,
area4,
rare4,
rear4,
3 letter words:
kak11,
aka7,
ake7,
ark7,
erk7,
kae7,
kea7,
ace5,
arc5,
caa5,
car5,
rec5,
are3,
ear3,
era3,
err3,
2 letter words:
ka6,
aa2,
ae2,
ar2,
ea2,
er2,
re2,