-er
-est
re-
pre-
-tion
100

Happy

happier

100

Sad

saddest

100

Do

redo

100

Cook

precook

100

Invite

invitation

200

Kind

kinder

200

Shiny

shiniest

200

start

Restart

200

pack

Prepack

200

Educate

education

300

Sneaky

sneakier

300

Smart

smartest

300

Read

reread

300

Register

Preregister
300
Multiply

multiplication

400

Twist

twister

400

Tricky

trickiest

400

Write

rewrite

400

School

preschool

400

Animate

animation

500

Hollow

hollower

500

Bright

brightest

500

Knead

reknead

500

Manufacture 

premanufacture

500

Memorize

memorization

M
e
n
u