replication vs copying

replication and copying both are nouns.

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

As nouns, copying is a hypernym of replication; that is, copying is a word with a broader meaning than replication:

replication (noun)	copying (noun)
the act of making copies	an act of copying
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