Final answer:
Nouns can be classified as common, proper, collective, or abstract.
Explanation:
Nouns can be categorized as common, proper, collective, or abstract. Examples include:
- Proper noun: Kautilya, common noun: political scientist
- Abstract noun: struggle, common noun: life
- Collective noun: women, proper noun: Vivekananda
- Common noun: concentration, abstract noun: health
- Common noun: stone, abstract noun: moss
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