The phrase "opened wide" is often used to describe something that is fully expanded or exposed. There are many synonyms for this phrase that can be used to add variety to your writing or speaking. Some alternatives include "spread out," "splayed," "unfurled," "extended," "released," "dispersed," "unleashed," and "unlocked." Each of these words conveys a slightly different meaning, so it's important to choose the one that best fits the context of your sentence. Whether you're describing a flower blooming or a mouth waiting for food, there's sure to be a synonym for "opened wide" that will help you convey your message with clarity and style.