Dagestan rhymes with:
afghanistan, hindustan, kurdistan, kyrgyzstan, pakistan, tajikistan, tatarstan, tristan, turkmenistan, uzbekistan
Dagestan sounds like:
d'agostino, dagostino, dakotan, daughton, dedication, deduction, degaetano, deighton, desiccation, destin, destiny, destitution, detection, detoxication, dichotomy, dickstein, dictation, diction, dictum, dideoxycytidine, digaetano, digestion, digidyne, disdain, dissection, dissociation, doughten, dukedom, dustin, dustman, duston