ñuhor - nominative singular ñurha - nominative plural ñuhyz - accusative singular(?) ??? - accusative plural
Please correct me if I'm wrong and does anyone know what the accusative plural is?? I didn't encounter it in the lesson.
You're confusing the genders here a little. You've got ñuhor/ñurha right, but they're only for aquatic nouns (and they're accusative as well, I think). "ñuhyz" is for nominative solar nouns. And it's plural, but only for some of the nouns. For the rest it's ñuhys, which is the singular nominative for solar nouns as well.