These are the -ier and -iest suffixes
If a word ends in 'y' we remove it before adding these suffixes (e.g. angry becomes angrier or angriest)
We often add these suffixes to words when we are comparing things (e.g. Sally is funny, James is funnier, but Kate is the funniest.)
Word Lists
-ier
angrier
busier
chillier
clumsier
cosier
crazier
dirtier
dustier
funnier
happier
healthier
heavier
hungrier
lazier
lonelier
lovelier
luckier
merrier
nastier
noisier
prettier
rustier
sillier
tidier
-iest
angriest
busiest
chilliest
clumsiest
cosiest
craziest
dirtiest
dustiest
funniest
happiest
healthiest
heaviest
hungriest
laziest
loneliest
loveliest
luckiest
merriest
nastiest
noisiest
prettiest
rustiest
silliest
tidiest