sympathectomy vs cutting out

sympathectomy and cutting out both are nouns.

Word	Noun	Adjective	Verb	Adverb
sympathectomy	Yes	No	No	No
cutting out	Yes	No	No	No

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

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

Other hypernyms of sympathectomy include ablation, excision, extirpation.

sympathectomy (noun)	cutting out (noun)
surgical interruption of a nerve pathway in the sympathetic nervous system	surgical removal of a body part or tissue