Photochemical is an adjective that describes any chemical reactions or processes that are initiated by light. Synonyms for this word include photolytic, photoinduced, photooxidative, and photosynthetic. Photolytic refers to the breaking down of compounds through exposure to light. Photoinduced describes processes that begin with light and lead to subsequent reactions. Photooxidative refers to reactions that occur due to oxygen and light. Photosynthetic specifically references the process of converting light into energy to fuel plant growth. The use of synonyms like these can help add variety to scientific discussions and descriptions related to light-induced chemical reactions.