thrombectomy vs ablation

thrombectomy and ablation both are nouns.

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

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

thrombectomy: surgical removal of a blood clot (thrombus) from a blood vessel
ablation: surgical removal of a body part or tissue

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

thrombectomy (noun)	ablation (noun)
surgical removal of a blood clot (thrombus) from a blood vessel	surgical removal of a body part or tissue
	the erosive process that reduces the size of glaciers