metacyesis vs extrauterine gestation

metacyesis and extrauterine gestation both are nouns.

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

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

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

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

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