"Mal a propos" is a French term that translates to "badly timed" or "inappropriate." There are several synonyms that can be used in place of these words depending on the context. For example, "ill-timed," "inopportune," "unseasonable," or "unfortunate" can be used as synonyms for "mal a propos" when referring to timing. Similarly, "improper," "unbecoming," "tactless," or "indiscreet" could be used as alternatives when referring to inappropriateness. The choice of synonym will depend on the exact context in which "mal a propos" is being used, but the key is to find a word that conveys the same meaning with the appropriate tone and nuance.