"Spread wide" is a phrase that can be used to describe a variety of actions or movements. To convey this idea using different words, you could use synonyms such as "splay," "extend," or "fan out." Another option might be to describe the action using more descriptive language, such as "open up to their maximum width," "stretch out as far as possible," or "reach out to their full extent." Other synonyms that might be appropriate depending on the context include "expand," "unfurl," and "unfold." By using these synonyms or similar phrasing, you can convey the same idea as "spread wide" with a slightly different tone or emphasis.