lymphoblast vs lymph cell

lymphoblast and lymph cell both are nouns.

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

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

lymphoblast: an immature lymphocyte
lymph cell: an agranulocytic leukocyte that normally makes up a quarter of the white blood cell count but increases in the presence of infection

Other hypernyms of lymphoblast include lymphocyte.

lymphoblast (noun)	lymph cell (noun)
an immature lymphocyte	an agranulocytic leukocyte that normally makes up a quarter of the white blood cell count but increases in the presence of infection