splenectomy vs ablation

splenectomy and ablation both are nouns.

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

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

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

splenectomy (noun)	ablation (noun)
surgical removal of the spleen	surgical removal of a body part or tissue
	the erosive process that reduces the size of glaciers