What is a synonym for ingredient?

Here are some synonyms for "ingredient", depending on the context:

General:

* Component

* Constituent

* Element

* Factor

* Part

* Piece

* Substance

More specific:

* Spice (for food)

* Material (for building or manufacturing)

* Input (for a process or system)

* Item (for a list)

The best synonym to use will depend on the specific situation and the meaning you want to convey.