eccyesis vs extrauterine gestation

eccyesis and extrauterine gestation both are nouns.

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

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

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

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

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