Basics of noun


common


abstract- lass clear things - emotions


group- a collective like a group such as a flock, family etc


concrete- something that can be perceived
              - can be divided into countable or non-countable




Proper 


unique things, names of cities, companies etc...


Abstract nouns can be easily confused with adjectives
- anxious vs anxiety


Dictionary- concrete
despair- abstract
herd- group
joy- abstract
sellotape- proper