Solution

SOLID

3 clues

Compact

Word class: Common adjective
Nature of clue: Synonym
Difficulty: Easy
Sources: Boatload Puzzles
Topics: Materials

Other solutions to Compact

Firm

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

Other solutions to Firm

Not liquid

Word class: Common adjective
Nature of clue: Description
Difficulty: Very easy
Sources: Boatload Puzzles
Topics: Materials, Science

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