Nouns:
* Nutrient: A substance that provides nourishment for an organism.
* Nutrition: The process of taking in and utilizing food.
* Nutritive: Relating to the process of nourishing.
* Nutriment: Nourishment.
Verbs:
* Nourish: To provide with food or other substances necessary for growth and health.
* Nurture: To care for and help grow or develop.
* Nutrify: To provide nourishment to.
Adjectives:
* Nutritious: Providing nourishment.
* Nutritive: Having the quality of nourishing.
Other related words:
* Malnutrition: Poor nutrition.
* Overnutrition: Excess nutrition.
* Nutrigenomics: The study of how food affects gene expression.
These are just a few examples. You can find many more words related to "nutri" by looking in a dictionary or online etymology resource.