They're both flavorings, so as long as you don't mind the almond taste, why not?
you can buy almond extract in almost any grocery store in the same aisle as the vanilla extract.
It is a flavoring produced by combining bitter-almond oil with ethyl alcohol. The flavor is very intense, so the extract should be used with care.
A peach pit!
No, almond extract and anise extract taste different from each other. A different answer: Yes, most flavoring extracts can be substituted for each other, as long as the cook realizes the tastes will...