Solution

MAINTAIN

4 clues

Assert

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

Other solutions to Assert

Contend

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

Other solutions to Contend

Keep up

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

Preserve

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

Other solutions to Preserve

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