-ish / -ity
pessimistic
pessimism
patient
patience
selfish
selfishness
foolish
foolishness
honest
honesty
brave
bravery
accurate
accuracy
mature
maturity
optimistic
optimism
reliable
reliability
violent
violence
stupid
stupidity
warm
warmth
possible
possibility
safe
safety
loyal
loyalty
popular
popularity
proud
pride
necessary
necessity
strong
strength
realistic
realism
ill
illness
anxious
anxiety
superior
superiority
inferior
inferiority