Word Families are repetitive patterns (families) of letter combinations found at the end of words. 

ack

back
crack
quack

ad

bad
sad
dad

ail

fail
mail
sail

ain

brain
pain
train

ake

bake
cake
flake

ale

bale
dale
gale

all

fall
mall
wall

am

ham
Sam
slam

ame

came
fame
shame

an

bran
Fran
tan

ank

bank
plank
tank

ap

clap
lap
sap

ask

dash
lash
sash

at

cat
pat
that

ate

crate
date
plate

aw

claw
gnaw
slaw

ay

clay
gray
spray

eat

feat
meat
wheat

eel

feel
heel
wheel

eep

deep
peep
steep

eet

greet
meet
sweet

ell

dell
smell
tell

en

den
men
wren

ent

cent
rent
vent

est

jest
test
west

ice

nice
mice
slice

ick

pick
quick
trick

ide

bride
ride
wide

ife

knife
life
wife

ight

bright
fright
night

ile

Nile
smile
tile

ill

hill
Jill
still

in

bin
grin
spin

ine

dine
mine
swine

ing

bring
king
sing

ink

mink
rink
think

ip

grip
ship
trip

it

bit
kit
quit

oat

coat
goat
throat

ock

block
flock
o'clock

og

dog
frog
log

oil

boil
foil
soil

oke

broke
Coke
woke

oo

boo
moo
zoo

ood

hood
stood
wood

oof

goof
roof
spoof

ook

book
crook
took

oom

boom
broom
room

ood

brood
food
mood

ool

cool
spool
tool

oon

moon
soon
spoon

oop

hoop
scoop
troop

oot

boot
hoot
shoot

oot

foot
soot
 

op

crop
flop
top

ore

chore
more
store

orn

corn
morn
thorn

ot

blot
plot
tot

ought

bought
sought
though

ould

could
should
would

ouse

house
mouse
spouse

out

shout
spout
stout

ow

cow
now
plow

ow

low
crow
slow

own

brown
down
town

uck

duck
stuck
yuck

ug

bug
jug
rug

ump

bump
jump
pump

unk

junk
plunk
trunk