blastocoele vs segmentation cavity

blastocoele and segmentation cavity both are nouns.

Word	Noun	Adjective	Verb	Adverb
blastocoele	Yes	No	No	No
segmentation cavity	Yes	No	No	No

As nouns, blastocoele and segmentation cavity are synonyms defined as:

blastocoele and segmentation cavity: the fluid-filled cavity inside a blastula

Other synonyms of blastocoele include blastocele, blastocoel, cleavage cavity.

blastocoele (noun)	segmentation cavity (noun)
the fluid-filled cavity inside a blastula	the fluid-filled cavity inside a blastula