Year 2

The suffixes -ment, -ness and -ful

enjoyment, sadness, careful, playful, plainness, argument, merriment, happiness, plentiful, cheerful

Year 3

Words ending in -ary

library, February, dictionary, boundary, salary, summary, primary, secondary, ordinary, necessary

Year 4

Adding the prefix inter – (meaning ‘between or among’)

interact, interfere, intercity, international, intermediate, internet, intergalactic, interrupt, intervene, interlude