English has a few suffixes that can make abstract nouns out of adjectives: There’s the relatively rare –cy, which turns fluent into fluency and idiot into idiocy. There’s the more common –ty or –ity ...
Here's a little English grammar lesson for readers, free of charge. Today's lesson concerns nouns. You may remember this from your schooling: A noun is the name of a person, place, thing, thought, or ...