adenoidectomy vs extirpation

adenoidectomy and extirpation both are nouns.

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

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

adenoidectomy: surgical removal of the adenoids; commonly performed along with tonsillectomy
extirpation: surgical removal of a body part or tissue

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

adenoidectomy (noun)	extirpation (noun)
surgical removal of the adenoids; commonly performed along with tonsillectomy	surgical removal of a body part or tissue
	the act of pulling up or out; uprooting; cutting off from existence