Solution

STACK

2 clues

Heap

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

Other solutions to Heap

Pile

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

Other solutions to Pile

HEAP

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