The phrase "was open" can be expressed in a variety of ways, depending on the context in which it is used. Synonyms for this phrase might include "unlocked," "accessible," "unobstructed," "unsealed," "unbarred," "exposed," "uncovered," "revealed," or "unfastened." Each of these words carries a slightly different connotation, so choosing the right synonym will depend on the intended meaning of the sentence. For example, "accessible" might be the best choice if the focus is on ease of access, while "unlocked" might be more appropriate if the emphasis is on security or lack thereof. Ultimately, the choice of synonym will help to convey the intended meaning clearly and effectively.