7 letter words:
apparat11,
5 letter words:
tappa9,
apart7,
parra7,
4 letter words:
papa8,
parp8,
arpa6,
atap6,
para6,
parr6,
part6,
prat6,
rapt6,
tapa6,
tarp6,
trap6,
arar4,
rata4,
tara4,
3 letter words:
app7,
pap7,
apt5,
par5,
pat5,
rap5,
tap5,
art3,
rat3,
tar3,
2 letter words:
pa4,
aa2,
ar2,
at2,
ta2,