The category of case of nouns

Collective Nouns
Collective nouns are words that denote groups. For example:

• 
  team
  
• 
  choir
  
• 
  pack
  

Collective nouns can be treated as singular or plural. It depends on the sense of your sentence. For example:

• 
  The team is scheduled to arrive at 4 o'clock.
  
• 
  The team are wearing different novelty hats.
  

Read more about treating collective nouns as singular and plural.
Compound Nouns
Compound nouns are nouns made up of more than one word. For example:

• 
  court-martial
  
• 
  pickpocket
  
• 
  water bottle
  

Some compound nouns are hyphenated, some are not, and some combine their words to form a single word.
Concrete Nouns
Concrete nouns are things you can see or touch. For example:

• 
  tree
  
• 
  hammer
  
• 
  cloud
  

Non-countable Nouns
Non-countable nouns (or mass nouns) are things you cannot count. For example:

• 
  food
  
• 
  music
  
• 
  water
  

Gender-specific Nouns
Gender-specific nouns are nouns that are definitely male or female. For example:

• 
  king
  
• 
  vixen
  
• 
  actress
  

Verbal Nouns
Verbal nouns are nouns derived from verbs. (Verbal nouns have no verb-like properties.) For example (verbal nouns shown in bold):

• 
  a good building
  
• 
  a fine drawing
  
• 
  an effective attack
  

In the examples above, the verbal nouns are shown with adjectives to differentiate them from gerunds (which are often confused with verbal nouns). Gerunds are modified with adverbs not adjectives.
Gerunds
Gerunds are nouns that end -ing and that represent actions. (Gerunds have verb-like properties.) For example (gerunds shown in bold):

• 
  happily building a tower
  
• 
  quickly drawing the scene
  
• 
  suddenly attacking the enemy
  

In the examples above, the gerunds are shown with adverbs and direct objects to differentiate them from verbal nouns (which are often confused with gerunds).