Substitute words are words that can be used in place of another word to convey a similar meaning. They are often used to avoid repetition or to add variety and nuance to writing or speech. Examples include synonyms, antonyms, and homophones.

Similar.

You can substitute words which are synonyms. They can be used in place of each other.

Sometimes you can. It all depends on how similar the substitute tastes to the original ingredient.

Yes, I've used this substitute and it works quite well. The flavors are also similar.