7 letter words:
naphtha15,
6 letter words:
aphtha14,
thanah12,
5 letter words:
hatha11,
hanap10,
thana8,
4 letter words:
haha10,
hath10,
path9,
phat9,
hant7,
taha7,
tanh7,
than7,
atap6,
napa6,
pant6,
tapa6,
anta4,
tana4,
3 letter words:
hah9,
hap8,
pah8,
pht8,
aah6,
aha6,
han6,
hat6,
nah6,
nth6,
apt5,
nap5,
pan5,
pat5,
tap5,
ana3,
ant3,
nat3,
tan3,
2 letter words:
ah5,
ha5,
pa4,
aa2,
an2,
at2,
na2,
ta2,