Shredibility 

Takes the place of credibility when discussing guitar skills.

"His shredibility proved once and for all that he was a Rock God." or - "His shredibility spoke for itself."

Shredibility by Mount Royal Guitar God February 8, 2008

Shredability 

A measure of how easy it is to shred on one's guitar, or how well suited a guitar is for shredding.

"My Ibanez S7420 has amazing shredability."

"You won't get much shredability with that banjo."

"Just because you have EMGS doesn't mean your guitar has good shredability."

Shredability by The Shredaholic April 6, 2009