What's the difference between heaper and heaver?

Heaper

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Definition:

• (n.) One who heaps, piles, or amasses.

Example Sentences:

Heaver

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Definition:

• (n.) One who, or that which, heaves or lifts; a laborer employed on docks in handling freight; as, a coal heaver.
• (n.) A bar used as a lever.

Example Sentences:

• (1) The slightly heaver device will feature improved photo and video taking, with a greater resolution camera and an HD video recorder.