What are some long words that start with B?

The English language has a variety of long words that start with B. Here are a few of the most common ones, along with their definitions:

• Bioluminescence: Light emitted by certain organisms, such as fireflies (15 letters)
• Bigheartedness: Generosity (14 letters)
• Breathtakingly: To an astonishing and impressive degree (14 letters)
• Baccalaureate: Another word for a bachelor’s degree (13 letters)
• Balkanization: The act of breaking up a larger region into smaller, independent states (13 letters)
• Bureaucratize: To make an organization or government more complicated (13 letters)
• Brontosaurus: Very large dinosaur with a long neck and tail (12 letters)

When you’re learning new words that start with B, QuillBot’s AI Chat can show you definitions and example sentences.