Allegra rhymes with:
bocanegra, integra, agra, bhangra, bocanegra, conagra, integra, migra, niagara, pellagra, sinagra, viagra
Allegra sounds like:
alcazar, alcocer, alegre, alegria, aleshire, algar, alger, algeria, alguire, alkire, allegory, allegro, allgaier, allgeier, allgeyer