Solution

IRREGULAR

4 clues

Atypical

Word class: Common adjective
Nature of clue: Synonym
Difficulty: Very easy
Sources: Boatload Puzzles
Topics: Society

Not uniform

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

Uneven

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

Other solutions to Uneven

Unusual

Word class: Common adjective
Nature of clue: Synonym
Difficulty: Very easy
Sources: Boatload Puzzles
Topics: Society

Other solutions to Unusual

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