Solution

NECESSARY

2 clues

Essential

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

Other solutions to Essential

Required

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

Other solutions to Required

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