Here's what rhymes with dismemberment.

Consider these alternatives

decapitation / operation mutilation / education disintegration / relation premeditated / dated strangulation / relation gruesome / solution slaying / saying extermination / information savagery / very rape / age subjugation / education gory / story decimation / information partitioning / listening defilement / agreement cannibalism / given throes / those annexation / education torture / order maiming / training