compression vs concretion

compression and concretion both are nouns.

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

As nouns, compression and concretion are synonyms defined as:

Other synonyms of compression include compaction, densification.

compression (noun)	concretion (noun)
applying pressure	the union of diverse things into one body or form or group; the growing together of parts
encoding information while reducing the bandwidth or bits required	an increase in the density of something
the process or result of becoming smaller or pressed together	a hard lump produced by the concretion of mineral salts; found in hollow organs or ducts of the body
an increase in the density of something	the formation of stonelike objects within a body organ (e.g., the kidneys)