neutrophil vs leukocyte

neutrophil and leukocyte both are nouns.

Word	Noun	Adjective	Verb	Adverb
neutrophil	Yes	No	No	No
leukocyte	Yes	No	No	No

As nouns, leukocyte is a hypernym of neutrophil; that is, leukocyte is a word with a broader meaning than neutrophil:

neutrophil: the chief phagocytic leukocyte; stains with either basic or acid dyes
leukocyte: blood cells that engulf and digest bacteria and fungi; an important part of the body's defense system

Other hypernyms of neutrophil include leucocyte, WBC, white blood cell, white blood corpuscle, white cell, white corpuscle.

neutrophil (noun)	leukocyte (noun)
the chief phagocytic leukocyte; stains with either basic or acid dyes	blood cells that engulf and digest bacteria and fungi; an important part of the body's defense system