lymph cell vs leucocyte

lymph cell and leucocyte both are nouns.

Word	Noun	Adjective	Verb	Adverb
lymph cell	Yes	No	No	No
leucocyte	Yes	No	No	No

As nouns, leucocyte is a hypernym of lymph cell; that is, leucocyte is a word with a broader meaning than lymph cell:

lymph cell: an agranulocytic leukocyte that normally makes up a quarter of the white blood cell count but increases in the presence of infection
leucocyte: blood cells that engulf and digest bacteria and fungi; an important part of the body's defense system

Other hypernyms of lymph cell include leukocyte, WBC, white blood cell, white blood corpuscle, white cell, white corpuscle.

lymph cell (noun)	leucocyte (noun)
an agranulocytic leukocyte that normally makes up a quarter of the white blood cell count but increases in the presence of infection	blood cells that engulf and digest bacteria and fungi; an important part of the body's defense system