The term "two-eared" refers to something that has two ears or ear-like projections. There are several synonyms for this word that might be used instead, depending on the context. One alternative term could be "bi-aural," which implies that something is heard through both ears simultaneously. Another option might be "dual-aural," which suggests that something is designed to utilize both ears in order to achieve optimal sound quality or spatial awareness. Other synonyms for "two-eared" might include "binaric," which refers to a system or device that has two distinct inputs or outputs, or "stereophonic," which pertains specifically to sound that is produced in two channels or directions.