adrenalectomy vs ablation

adrenalectomy and ablation both are nouns.

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

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

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

adrenalectomy (noun)	ablation (noun)
surgical removal of one or both adrenal glands	surgical removal of a body part or tissue
	the erosive process that reduces the size of glaciers