collect
collection
weak
weakness
predict
prediction
kind
kindness
lonely
loneliness
pollute
pollution
active
activity
quiet
quietness
private
privacy
educate
education
fit
fitness
relax
relaxation
accurate
accuracy
creative
creativity
blind
blindness
import
importance
occur
occurrence
appear
appearance
stupid
stupidity
lazy
laziness
imagine
imagination
popular
popularity
secure
security
differ
difference