sigmoidectomy vs extirpation

sigmoidectomy and extirpation both are nouns.

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

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

sigmoidectomy: surgical removal of part or all of the sigmoid colon (usually to remove a malignant tumor)
extirpation: surgical removal of a body part or tissue

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

sigmoidectomy (noun)	extirpation (noun)
surgical removal of part or all of the sigmoid colon (usually to remove a malignant tumor)	surgical removal of a body part or tissue
	the act of pulling up or out; uprooting; cutting off from existence