sympathectomy vs extirpation

sympathectomy and extirpation both are nouns.

Word	Noun	Adjective	Verb	Adverb
sympathectomy	Yes	No	No	No
extirpation	Yes	No	No	No

As nouns, extirpation is a hypernym of sympathectomy; that is, extirpation is a word with a broader meaning than sympathectomy:

sympathectomy: surgical interruption of a nerve pathway in the sympathetic nervous system
extirpation: surgical removal of a body part or tissue

Other hypernyms of sympathectomy include ablation, cutting out, excision.

sympathectomy (noun)	extirpation (noun)
surgical interruption of a nerve pathway in the sympathetic nervous system	surgical removal of a body part or tissue
	the act of pulling up or out; uprooting; cutting off from existence