secondary amenorrhea vs amenia

secondary amenorrhea and amenia both are nouns.

Word	Noun	Adjective	Verb	Adverb
secondary amenorrhea	Yes	No	No	No
amenia	Yes	No	No	No

As nouns, amenia is a hypernym of secondary amenorrhea; that is, amenia is a word with a broader meaning than secondary amenorrhea:

secondary amenorrhea: cessation of menstruation in a woman who had previously menstruated
amenia: absence or suppression of normal menstrual flow

Other hypernyms of secondary amenorrhea include amenorrhea, amenorrhoea.

secondary amenorrhea (noun)	amenia (noun)
cessation of menstruation in a woman who had previously menstruated	absence or suppression of normal menstrual flow