What are the synonyms and opposites of these adjectives? Make sentences with them.

Synonyms for 'bright' are 'brilliant' and 'radiant'; opposites are 'dull' and 'dim'. Synonyms for 'young' are 'youthful' and 'juvenile'; opposites are 'old' and 'elderly'. Example sentences: 'The singer's voice was radiant and full of energy.' 'Despite her age, the artist's performance was youthful and lively.'