Open-hearted is defined as someone who is generous, sincere, and honest. There are many synonyms that can be used to describe this type of personality. Some of the most common synonyms are kind-hearted, warm-hearted, friendly, empathetic, and compassionate. Other synonyms include benevolent, open-minded, and magnanimous. These words all describe a person who is willing to put others before themselves, is approachable and happy to listen, and is open to new ideas and ways of thinking. Overall, anyone who embodies an open-hearted personality is someone who is sure to be a positive influence on those around them.