copying vs replication

copying and replication both are nouns.

Word	Noun	Adjective	Verb	Adverb
copying	Yes	No	No	No
replication	Yes	No	No	No

As nouns, replication is a hyponym of copying; that is, replication is a word with a more specific, narrower meaning than copying:

Other hyponyms of copying include duplication, gemination, reproduction, imitation.

copying (noun)	replication (noun)
an act of copying	the act of making copies
	the repetition of an experiment in order to test the validity of its conclusion
	copy that is not the original; something that has been copied
	the repetition of a sound resulting from reflection of the sound waves
	(law) a pleading made by a plaintiff in reply to the defendant's plea or answer
	a quick reply to a question or remark (especially a witty or critical one)
	(genetics) the process whereby DNA makes a copy of itself before cell division