6 letter words:
actant8,
natant6,
5 letter words:
canna7,
tacan7,
annat5,
tanna5,
4 letter words:
acta6,
cann6,
cant6,
tact6,
anan4,
anna4,
anta4,
naan4,
nana4,
tana4,
3 letter words:
act5,
caa5,
can5,
cat5,
ana3,
ann3,
ant3,
att3,
nan3,
nat3,
tan3,
tat3,
2 letter words:
aa2,
an2,
at2,
na2,
ta2,