11 letter words:
ineffective22,
9 letter words:
effective20,
efficient17,
infective17,
7 letter words:
fictive15,
fifteen13,
evictee12,
invitee10,
6 letter words:
effect14,
effete12,
tiffin12,
evince11,
infect11,
finite9,
invite9,
entice8,
incite8,
5 letter words:
civet10,
civie10,
evict10,
fence10,
ficin10,
vinic10,
event8,
evite8,
feint8,
nieve8,
niece7,
4 letter words:
fief10,
fife10,
five10,
teff10,
tiff10,
fice9,
vice9,
even7,
feet7,
fete7,
fine7,
neif7,
neve7,
nevi7,
vein7,
vent7,
vine7,
cent6,
cete6,
cine6,
cite6,
etic6,
nice6,
inti4,
nite4,
teen4,
tine4,
3 letter words:
eff9,
iff9,
eft6,
eve6,
fee6,
fen6,
fet6,
fie6,
fin6,
fit6,
vee6,
vet6,
vie6,
cee5,
ice5,
tic5,
nee3,
net3,
nit3,
tee3,
ten3,
tie3,
tin3,
2 letter words:
ef5,
fe5,
if5,
en2,
et2,
in2,
it2,
ne2,
ti2,