Menstrual rhymes with:
annual, asexual, audiovisual, biannual, bisexual, conceptual, consensual, continual, contractual, emanuel, emmanuel, eventual, factual, gradual, habitual, ineffectual, intellectual, manual, massmutual, parimutuel, pascual, perpetual, punctual, residual, ritual, sexual, transsexual, virtual
Menstrual sounds like:
magisterial, masterly, ministerial, ministral, minstrel, mistral, mistrial