haematocrit vs separator

haematocrit and separator both are nouns.

Word	Noun	Adjective	Verb	Adverb
haematocrit	Yes	No	No	No
separator	Yes	No	No	No

As nouns, separator is a hypernym of haematocrit; that is, separator is a word with a broader meaning than haematocrit:

haematocrit: a measuring instrument to determine (usually by centrifugation) the relative amounts of corpuscles and plasma in the blood
separator: an apparatus that uses centrifugal force to separate particles from a suspension

Other hypernyms of haematocrit include centrifuge, extractor, measuring device, measuring instrument, measuring system.

haematocrit (noun)	separator (noun)
a measuring instrument to determine (usually by centrifugation) the relative amounts of corpuscles and plasma in the blood	an apparatus that uses centrifugal force to separate particles from a suspension
the ratio of the volume occupied by packed red blood cells to the volume of the whole blood as measured by a hematocrit