Aquitaine rhymes with:
detain, retain, abstain, ascertain, attain, brattain, buntain, butane, chastain, contain, costain, detain, entertain, fontaine, fountaine, lafountain, lafountaine, lamontagne, maintain, mustain, obtain, partain, pertain, petain, retain, sartain, stain, sustain, uptain
Aquitaine sounds like:
academe, academia, academy, accusation, accustom, accutane, acetone, acquisition, acquitaine, actin, action, actodine, acton, agitation, agostini, agostino, agustin, akkadian, ashdown, ashton, assocation, association, asthma, astin, aston, auction, augustin, augustine, augustinian, augustyn, austen, austin, austine, auston, auxton, axtman, axton, azactam