Rhamphoid is a rarely used word that refers to anything that resembles a beak. If you are looking for synonyms for this unusual term, you might consider using words like bill-shaped, hook-shaped, curved, or pointed. Other possible alternatives might include words such as snout-like, eagle-like, or bird-like, as these all reference similar shapes. Alternatively, if you are trying to describe a specific type of organism or structure that resembles a beak, you might opt to use more specific terms, such as proboscis, mandible, rostrum, or snout, depending on your intended usage.