Question

the irregular comparative words agree in with the first noun.

Explanation:

In the context of grammar (within Linguistics, a subfield of Arts), irregular comparative words (like "better" from "good") agree in gender and number with the first noun in some languages (e.g., Spanish: "el libro bueno" vs "los libros buenos", with "bueno" agreeing in number; "la casa buena" vs "las casas buenas", agreeing in gender and number). This is about agreement in grammatical categories like gender (masculine/feminine) and number (singular/plural) between the comparative adjective and the noun it modifies.

Answer:

gender and number