Consonance: The repetition of consonants in words stressed in the same place (but whose vowels differ). Also, a kind of inverted alliteration, in which final consonants, rather than initial or medial ones, repeat in nearby words. Consonance is more properly a term associated with modern poetics than with historical rhetorical terminology.
What he knew he lacked in substance he backed with pounding fists, vague references to “things” and snide asides directed toward his adversaries. He was a dangerous hack–a puffed-up throwback to the glory days of demagogues, dictators and political thugs. We owe it to ourselves to put politicians like him on shelves labeled “Poison: Do Not Elect.”
Definition courtesy of “Silva Rhetoricae” (rhetoric.byu.edu)