sperm count vs reckoning

sperm count and reckoning both are nouns.

Word	Noun	Adjective	Verb	Adverb
sperm count	Yes	No	No	No
reckoning	Yes	No	No	No

As nouns, reckoning is a hypernym of sperm count; that is, reckoning is a word with a broader meaning than sperm count:

sperm count: the act of estimating the number of spermatozoa in an ejaculate
reckoning: the act of counting; reciting numbers in ascending order

Other hypernyms of sperm count include count, counting, enumeration, numeration, tally.

sperm count (noun)	reckoning (noun)
the act of estimating the number of spermatozoa in an ejaculate	the act of counting; reciting numbers in ascending order
the number of sperm in an ejaculate	problem solving that involves numbers or quantities
	a bill for an amount due