It depends what you're making and why you wish to substitute. If you're making pesto, you can do it with parsley.
General basil substitutions:
You could use arugula (which has a spicy, peppery taste), but if you're substituting due to cost, try parsley, which is cheap. You could use any of those herb-y greens that are also used in salads. Check your produce section for the bagged herb salad to see what's in there. Almost anything in there could be used instead.
Basil is a good blood cleanser, though, and very good for you. If possible, I say use it!
Ali W.
A bazil is another term for a basil, a tanned sheepskin.
Ezekiel Bazil was born in 1965.
Bazil Ashmawy was born in Libya.
Bazil Broketail - novel - was created in 1992.
Bazil Donovan was born on April 29, 1955.
Bazil Broketail - novel - has 480 pages.
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Yes, you can replace milk with almond milk in the recipe.
Yes, you can replace milk with half and half in the recipe.
Yes, it is possible to replace sugar with honey in this recipe.
The ISBN of Bazil Broketail - novel - is 0-451-45206-2.
To replace oil with butter in a recipe, use a 1:1 ratio. Simply melt the butter and use it in place of the oil called for in the recipe.