7 letter words:
ratatat7,
6 letter words:
ataata6,
5 letter words:
karat9,
attar5,
taata5,
tatar5,
tratt5,
4 letter words:
arak8,
kara8,
kart8,
kata8,
taka8,
rata4,
tara4,
tart4,
tatt4,
trat4,
3 letter words:
aka7,
ark7,
kat7,
tak7,
art3,
att3,
rat3,
tar3,
tat3,
2 letter words:
ka6,
aa2,
ar2,
at2,
ta2,