Solution

GEL

4 clues

Hair goo

Word class: Common noun
Nature of clue: Description
Difficulty: Very easy
Sources: Boatload Puzzles
Topics: Fashion

Harden

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

Other solutions to Harden

Set

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

Other solutions to Set

Toothpaste form

Word class: Common noun
Nature of clue: Description
Difficulty: Very easy
Sources: Boatload Puzzles
Topics: Materials, Medicine Pharma

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