Do you mean:
* Nouns that are grammatically marked for gender? (e.g., "actor" vs. "actress" in English, or "el libro" vs. "la mesa" in Spanish)
* Nouns that specifically refer to a gender? (e.g., "woman," "man," "boy," "girl")
* Nouns that are stereotypically associated with a particular gender? (e.g., "pink" for girls, "blue" for boys)
Once you clarify your question, I can give you more relevant examples.