Object nouns:
- Table
- Chair
- Book
- Pen
- Phone
- Window
- Computer
Concepts or abstract nouns:
- Idea
- Thought
- Happiness
- Time
- Knowledge
Animals (when sex is not specified):
- Fish
- Bird
- Dog (when referring to the species, not an individual with a known gender)
Unspecified or inanimate things:
- Country
- Building
- Car
- Tree