amniocentesis vs amnio

amniocentesis and amnio both are nouns.

Word	Noun	Adjective	Verb	Adverb
amniocentesis	Yes	No	No	No
amnio	Yes	No	No	No

As nouns, amniocentesis and amnio are synonyms defined as:

amniocentesis and amnio: (pregnancy) extraction by centesis of amniotic fluid from a pregnant woman (after the 15th week of pregnancy) to aid in the diagnosis of fetal abnormalities

amniocentesis (noun)	amnio (noun)
(pregnancy) extraction by centesis of amniotic fluid from a pregnant woman (after the 15th week of pregnancy) to aid in the diagnosis of fetal abnormalities	(pregnancy) extraction by centesis of amniotic fluid from a pregnant woman (after the 15th week of pregnancy) to aid in the diagnosis of fetal abnormalities