10 letter words:
firstborns15,
9 letter words:
firstborn14,
7 letter words:
forints10,
frisson10,
bistros9,
6 letter words:
firsts9,
foists9,
forint9,
forrit9,
fortis9,
fronts9,
frosts9,
bionts8,
bisons8,
bistro8,
orbits8,
robins8,
intros6,
nitros6,
rosins6,
snorts6,
tsoris6,
5 letter words:
forbs10,
finos8,
firns8,
first8,
fists8,
foins8,
foist8,
fonts8,
forts8,
frits8,
frons8,
front8,
frost8,
infos8,
rifts8,
sifts8,
softs8,
bints7,
biont7,
biros7,
birrs7,
bison7,
borts7,
brins7,
brios7,
briss7,
brits7,
obits7,
orbit7,
robin7,
snibs7,
snobs7,
sorbs7,
stobs7,
intro5,
irons5,
nitro5,
noirs5,
noris5,
ornis5,
orris5,
riots5,
rosin5,
rotis5,
snits5,
snort5,
snots5,
sorns5,
sorts5,
stirs5,
tiros5,
torrs5,
torsi5,
trios5,
trois5,
4 letter words:
fibs9,
fobs9,
forb9,
fino7,
fins7,
firn7,
firs7,
fist7,
fits7,
foin7,
fons7,
font7,
fort7,
foss7,
frit7,
info7,
rifs7,
rift7,
sift7,
soft7,
bins6,
bint6,
bios6,
biro6,
birr6,
bits6,
born6,
bort6,
boss6,
bots6,
brin6,
brio6,
bris6,
brit6,
bros6,
nibs6,
nobs6,
obis6,
obit6,
orbs6,
ribs6,
robs6,
sibs6,
snib6,
snob6,
sobs6,
sorb6,
stob6,
inro4,
into4,
ions4,
iron4,
nits4,
noir4,
nori4,
orts4,
rins4,
riot4,
roti4,
rots4,
sins4,
sirs4,
sits4,
snit4,
snot4,
sons4,
sori4,
sorn4,
sort4,
sots4,
sris4,
stir4,
tins4,
tiro4,
tons4,
tori4,
torn4,
torr4,
tors4,
toss4,
trio4,
3 letter words:
fib8,
fob8,
fin6,
fir6,
fit6,
fon6,
for6,
fro6,
ifs6,
oft6,
rif6,
bin5,
bio5,
bis5,
bit5,
bos5,
bot5,
bro5,
brr5,
nib5,
nob5,
obi5,
orb5,
rib5,
rob5,
sib5,
sob5,
ins3,
ion3,
its3,
nit3,
nor3,
nos3,
not3,
ons3,
ors3,
ort3,
rin3,
rot3,
sin3,
sir3,
sis3,
sit3,
son3,
sos3,
sot3,
sri3,
tin3,
tis3,
ton3,
tor3,
2 letter words:
if5,
of5,
bi4,
bo4,
in2,
is2,
it2,
no2,
oi2,
on2,
or2,
os2,
si2,
so2,
ti2,
to2,
