alanyeset

Nominative —

The bare stem. Subjects, predicate nouns, and the form you look up.

English job: subject / dictionary form

A ház nagy — the house is big. No suffix, no article required for the grammar.
After numbers and quantity words the noun stays nominative singular: három ház, sok ember.

A lány olvas.

The girl is reading.

Ez egy ház.

This is a house.