pancreatectomy vs ablation

pancreatectomy and ablation both are nouns.

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

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

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

pancreatectomy (noun)	ablation (noun)
surgical removal of part or all of the pancreas	surgical removal of a body part or tissue
	the erosive process that reduces the size of glaciers