encoding vs compression

encoding and compression both are nouns.

Word	Noun	Adjective	Verb	Adverb
encoding	Yes	No	No	No
compression	Yes	No	No	No

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

encoding: the activity of converting data or information into code
compression: encoding information while reducing the bandwidth or bits required

Other hyponyms of encoding include data encryption.

encoding (noun)	compression (noun)
the activity of converting data or information into code	applying pressure
	encoding information while reducing the bandwidth or bits required
	the process or result of becoming smaller or pressed together
	an increase in the density of something