antistrophe
noun
an·tis·tro·phe an-ˈti-strə-(ˌ)fē 
1
a
: the repetition of words in reversed order
b
: the repetition of a word or phrase at the end of successive clauses
2
a
: a returning movement in Greek choral dance exactly answering to a previous strophe
b
: the part of a choral song delivered during the antistrophe
antistrophic
ˌan-tə-ˈsträ-fik
adjective antistrophically
ˌan-tə-ˈsträ-fi-k(ə-)lē
adverb 
Word History
Etymology
Late Latin, from Greek antistrophē, from anti- + strophē strophe
First Known Use
circa 1550, in the meaning defined at sense 1a