The sapient races of Tamriel can be divided into three categories. There's the races of mer, men, and the beast races.

The races of mer are the elves, made of of Dunmer, Altmer, Bosmer, and Orsimer. Though humans typically call them Dark Elves, High Elves, Wood Elves, and Orcs, respectively.

The races of men are Imperials, Redguards, Nords, and Bretons.

And the two beast races are the aforementioned Argonians, and Khajiit, who are cat people.