✅ Inflexible describes being rigid and unyielding. In people, that might mean being stubborn or immovable (She was inflexible regarding her schedule).

✅ Obdurate describes being unmoved by pity, sympathy, or persuasion (She was an obdurate boss who could only be moved by logic).

✅ Inflexible and obdurate both describe being unyielding and stubborn, with a mind that is difficult to change or influence.

✅ Inflexible is a more general term, whereas obdurate is more specific. Obdurate means that you’re inflexible in specific circumstances (He was inflexible and always thought he was right; He was obdurate, but not unreasonable).

✅ Exuberance refers to a state of being extremely enthusiastic (His exuberance about small things made him fun to be around).

✅ Ebullience refers to a state of high spirits and exhilaration (Her ebullience was lovely to see).

✅ Exuberance and ebullience refer to similar kinds of emotion.

✅ Exuberance particularly suggests a lack of reserve along with a lot of enthusiasm (Her exuberance was charming, even when she said something tactless), whereas ebullience suggests excitement and high spirits (After the award ceremony, the room was filled with a sense of ebullience).

✅ Courageous describes being brave (The courageous puppy stared down a lizard the size of my thumb).

✅ Lionhearted describes being especially brave or particularly courageous (The usually lionhearted knight was nervous on the morning of the competition).

✅ Courageous and lionhearted have similar meanings, but lionhearted has a stronger, more intense meaning.

✅ Lionhearted is a very evocative word that is often used for literary or dramatic effect, whereas courageous is a little more everyday (It’s courageous of you to go skydiving; We need a lionhearted person to help us defeat the evil wizard).