The phrase "what about..." is commonly used when someone wants to bring up a topic or point that they feel has been overlooked or forgotten. Some synonyms for this phrase include "how about," "what if," "what regarding," and "what concerning." Each of these alternatives can be used in various contexts and situations to convey a similar meaning. For example, "how about we consider a different approach?" or "what if we tried something new?" These phrases can be effective in opening up discussions and getting people to consider alternative solutions to problems. Ultimately, using different phrases to express the same idea can lead to more engaging and productive conversations.