There are many synonyms for the word sweetheart, making it easy to add variety and express affection in different ways. Some of the most common synonyms include darling, honey, sugar, love, beloved, dearest, and beau. Other options include angel, treasure, heartthrob, paramour, flame, and significant other. Each word has its own connotations and can be used in different situations to convey different emotions. Whether sharing a sweet term of endearment with a spouse, partner, friend, or family member, using a different synonym can help keep things fresh and add a special touch to any conversation or exchange of affection.