There are several synonyms that can be used instead of the phrase "hard of hearing." Some of the most commonly used synonyms include "hearing impaired," "deafened," "auditorily challenged," and "hearing loss." These terms are typically used to describe individuals who have difficulty hearing or who have lost their ability to hear to some degree. Additional synonyms for "hard of hearing" may include "acoustic deficiency," "hearing disorder," "aural impairment," or "auditory dysfunction." It is important to note that the terminology used to describe hearing loss can vary depending on the individual's preferences and needs. It is always best to consult with the person in question to determine how they wish to be identified.