As nouns the difference between amenorrhea and dysmenorrhea
is that amenorrhea is (american spelling) while dysmenorrhea is (pathology) painful menstruation.
dysmenorrhea
English
Alternative forms
* dysmenorrhoea (British)
* (chiefly British)
Noun
(pathology) Painful menstruation.
Synonyms
* menorrhalgia
Derived terms
* dysmenorrheic
References
* ''The Language of Medicine