extrauterine pregnancy vs metacyesis

extrauterine pregnancy and metacyesis both are nouns.

Word	Noun	Adjective	Verb	Adverb
extrauterine pregnancy	Yes	No	No	No
metacyesis	Yes	No	No	No

As nouns, extrauterine pregnancy and metacyesis are synonyms defined as:

extrauterine pregnancy and metacyesis: pregnancy resulting from gestation elsewhere than in the uterus

Other synonyms of extrauterine pregnancy include eccyesis, ectopic gestation, ectopic pregnancy, extrauterine gestation.

extrauterine pregnancy (noun)	metacyesis (noun)
pregnancy resulting from gestation elsewhere than in the uterus	pregnancy resulting from gestation elsewhere than in the uterus