Solution

HOARD

3 clues

Cache

Word class: Common noun
Nature of clue: Synonym
Difficulty: Easy

Stash

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

Stockpile

Word class: Common noun
Nature of clue: Synonym
Difficulty: Easy

Other solutions to Stockpile

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