Solution

BALLS

2 clues

Formal dances

Word class: Common noun
Nature of clue: Description
Difficulty: Easy
Sources: Boatload Puzzles
Topics: Arts, Traditions

Spheres

Word class: Common noun
Nature of clue: Synonym
Difficulty: Very easy
Sources: Boatload Puzzles
Topics: Maths Physics

Other solutions to Spheres

Words are categorized by artificial intelligence: there can be mistakes.