Red-eyes, a term used to describe the condition of the eyes when they are bloodshot and irritated, can have several synonyms. The commonly used synonym for red-eyes is "bloodshot eyes". It is mostly caused due to lack of sleep, allergies, or excessive consumption of alcohol. Some other synonyms for it are "inflamed eyes", "red and sore eyes", "pink eyes" or "scleral injection". Another synonym is "conjunctivitis", which is an eye infection characterized by swelling, itching, and redness. In any case, it is important to consult an eye specialist if the condition persists or worsens.