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Optimus Rhyme - album - was created on 2004-03-15.
Solitary Confinement - Rhyme Asylum album - was created on 2010-04-23.
No, "any rock" does not rhyme with "billionaire." I also don't think that there are any rock names that rhyme with the word "billionaire." Sorry.
'It's Tricky' by Run DMC.
No.
Box does rhyme with rocks, though.