Mouse to Mice

So if the plural of mouse is mice, what about these pairings?....

Louse --> Lice. Okay, that one's valid.

Spouse --> Spice. Not so much.

House --> Hice. Is that even an English word?

Blouse --> Blice. No.

Douse --> Dice. Wait, that's a verb.... and those are small gaming cubes...