blastocoel vs segmentation cavity

blastocoel and segmentation cavity both are nouns.

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

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

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

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

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