ophthalmectomy vs ablation

ophthalmectomy and ablation both are nouns.

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

As nouns, ablation is a hypernym of ophthalmectomy; that is, ablation is a word with a broader meaning than ophthalmectomy:

Other hypernyms of ophthalmectomy include cutting out, excision, extirpation.

ophthalmectomy (noun)	ablation (noun)
surgical removal of an eye	surgical removal of a body part or tissue
	the erosive process that reduces the size of glaciers