And of course, the plural of spouse is spice.

I don't know, and the answer isn't clear. The general answer to this kind of question is because english wasn't invented by some person who made up consistent rules and patterns. Most likely the two words are from different languages which had different ways of forming plurals The roots of house are: hus or huis (old german) and the plural looked like huses or husas which is a pretty standard old way to do it. The roots of mouse are: mus or muus plural: myys or muys Not very clear is it? It seems that even in the 12th century 'mouse' had its own nonstandard plural form. My guess is that it was probably borrowed from a different language than other words of the time. Another animal word which has an unusual plural form is 'goose' " 'geese' Old Teutonic again: guus gose plural: guis, ges

and strange as it may seem , of louse it is lice ;)

Hello Fay , It is like a lucky strike of dice Such things don't occur twice ! ;)

i think because douse is not dice...i'm pretty sure...