According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 59 words with the pattern --IE--. That is, six letter words with 3rd letter I and 4th letter E. In alphabetical order, they are:
adieus
adieux
afield
aliens
apiece
ariels
briefs
briers
briery
chiefs
chield
chiels
client
criers
driegh
driers
driest
fliers
fliest
friend
friers
frieze
gaiety
goiest
griece
griefs
griesy
grieve
iciest
moiety
oriels
orient
osiers
osiery
pliers
priefe
priefs
priers
priest
prieve
quiets
scient
shield
shiels
shiers
shiest
skiers
sliest
slieve
spiels
spiers
stieve
thieve
triene
triens
triers
twiers
ubiety
wriest
Anna
amok
quos
inch
Mump.
Nonexistant
buzzzz:)
June
Quea! Probly
Alae
jazz
Avid