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"Spoken word rap" is kind of a redundant term. Hip hop is spoken word poetry performed over music. There is definitely performance poets out there who's style is closer to a hip hop aesthetic than others, Saul Williams being, in my opinion, the king, but he's got his feet in the hip hop game as well.
And Dahlak Brathwaite is pretty ill too:
... ANd Black Ice:
There are also some MCs that work in a more ambiguous free-form style that a little more closely resemble spoken word poetry (DoseOne, Aesop rock, Sage Francis, etc.)