What's the difference between whider and whiner?

Whider

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Definition:

• (adv.) Whither.

Example Sentences:

Whiner

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Definition:

• (n.) One who, or that which, whines.

Example Sentences:

• (1) This prompted a number of articles with headlines such as “Science proves gluten sensitivity isn’t real, people are just whiners” .
• (2) Maybe a peacock or a whiner could have muscled the banks into taking haircuts on AIG contracts.
• (3) Similarly, here's his hiring policy: “no jerks, no peacocks, no whiners".
• (4) A substance that could “integrate shirkers, malingerers, defeatists and whiners” into the labour market might even be sanctioned.