Solution

HOARD

3 clues

Cache

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

Stash

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

Stockpile

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

Other solutions to Stockpile

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