eroding vs ablation

eroding and ablation both are nouns.

Word	Noun	Adjective	Verb	Adverb
eroding	Yes	No	No	No
ablation	Yes	No	No	No

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

eroding: (geology) the mechanical process of wearing or grinding something down (as by particles washing over it), also figuratively
ablation: the erosive process that reduces the size of glaciers

eroding (noun)	ablation (noun)
(geology) the mechanical process of wearing or grinding something down (as by particles washing over it), also figuratively	surgical removal of a body part or tissue
	the erosive process that reduces the size of glaciers