Pronouns:
* He, she, it, they, we, you: These replace nouns that have already been mentioned, referring to people or things.
* Him, her, it, them, us, you: These are used as object pronouns, replacing nouns that are the object of a verb or preposition.
* His, her, its, their, our, your: These are possessive pronouns, indicating ownership or possession.
Other words:
* Same: This can be used to refer to the same thing that was just mentioned.
* Do, so: These can replace verbs or entire clauses, often used in response to a question or previous statement.
* The former, the latter: These are used to refer to the first and second items mentioned in a list.
* Such: This can be used to refer to the same type of thing that was just mentioned.
* That: This can be used to refer to a noun that has been mentioned before.
Example:
"I saw a dog. It was brown and fluffy."
Here, "it" replaces the noun "dog" and avoids repetition.
The best word to use will depend on the specific context and the relationship between the repeated noun and the sentence structure.