pitting vs indentation

pitting and indentation both are nouns.

Word	Noun	Adjective	Verb	Adverb
pitting	Yes	No	No	No
indentation	Yes	No	No	No

As nouns, pitting and indentation are synonyms defined as:

pitting and indentation: the formation of small pits in a surface as a consequence of corrosion

Other synonyms of pitting include roughness.

pitting (noun)	indentation (noun)
the formation of small pits in a surface as a consequence of corrosion	the act of cutting into an edge with toothlike notches or angular incisions
	the space left between the margin and the start of an indented line
	the formation of small pits in a surface as a consequence of corrosion
	a concave cut into a surface or edge (as in a coastline)