Oyster, clam, shellfish = مَحَار
I'm gonna eat some محار at your restaurant מחר.
Not really the same root(not related at all actually, I suspect), but I think that will do.
If you want an English one:
Her test is מחר. May her late night studies all this time not be in vain.
Also(since I can't edit)
Price, cost = מחיר
The מחיר will rise מחר.
The vowel here is different, but it still have the same letters.