What is another word for alimentary?

There isn't one single perfect synonym for "alimentary," as it depends on the specific context. However, here are some options depending on the meaning:

Referring to the digestive system:

* Digestive

* Gastrointestinal

* Alimentary canal

* Digestive tract

Referring to food and nourishment:

* Nutritional

* Nutritive

* Food

* Nourishing

Other options:

* Dietary

* Gastric

* Enteric

Ultimately, the best substitute for "alimentary" will depend on the specific context and what you are trying to convey.