Difference between Wear Down and Wear Away

WEAR DOWN vs WEAR AWAY: VERB

Dilapidate, Exantlate, Foreworn, Forworn, Wear away, Fag, Wear out, Tire out, Wear upon, Jade, Weary, Tire, Fatigue, Outwear, Wear

Fordone, Abrase, Begnaw, Foreworn, Forworn, Eat into, Eat away, Corrade, Gnaw at, Wear off, Eat at, Whittle away, Whittle down, Gnaw, Erode

Bedraggle, Dilapidate, Exantlate, Foreworn, Forworn, Wear away, Fag, Wear out, Tire out, Jade, Weary, Tire, Fatigue, Outwear, Wear

Fag out, Change state, Bemoil, Ablaqueate, Fordone, Abrase, Begnaw, Foreworn, Forworn, Eat into, Eat away, Corrade, Whittle down, Eat at, Erode

These both wear down over time, mostly in supercruise.
The cause of DDD is when discs wear down.
But strain had begun to wear down the marriage.
The patterns are permanent, but can wear down.
Machines wear down and need to be replaced.
The bars wear down quickly, but nothing more.
This will wear down the place pretty quickly.
As for other things that wear down, the spider can lose some control as is wears down.
That is why you need to make a replacement to the wear down wear parts.
This shape allows for the most even wear as you wear down the wheel.

Exposed pictographs would usually wear away with time and the elements.
TMJ or jaw dysfunctions are painful and can wear away enamel.
They contain harsh abrasives that can wear away young tooth enamel.
They might wear away unevenly, leaving the tooth edges looking misaligned.
With osteoarthritis, the cartilage starts to wear away over time.
AVCOAT, is designed to wear away as it heats up.
In severe cases, the discs wear away completely.
Eventually, all of the cartilage may wear away.
The wearing away of particles of rock as they bounce along the riverbed or knock against each other and wear away becoming more rounded.
Modern aluminum rims often have a line indicator for wear; once that starts to wear away, you should think about replacing that wheel.