When it comes to finding synonyms for the word "more sustentative," there are several options available. Some possibilities include: nourishing, enriching, substantial, strengthening, fortifying, invigorating, and life-giving. All of these words indicate that something is providing sustenance or support, whether it be for the body or the mind. An item or idea that is considered sustentative is likely to be considered essential or important, as it helps to maintain or improve one's overall well-being. Whether you are describing food, a philosophical concept, or an emotional connection, using one of these synonyms can help to convey a strong sense of vigor and vitality.