"Oh, what a shame" is a phrase that is used to express disappointment or sadness about a situation. There are several synonyms for this phrase, such as "what a pity," "how unfortunate," "it's a regret," "what a bummer," "what a tragedy," or "what a disappointment." These expressions convey a sense of sorrow or disappointment about something that has happened or been missed. They can be used in a variety of contexts, from personal to professional, depending on the situation. Using synonyms helps to avoid repetition of the same phrase and adds variety to language expressing emotions.