lumpectomy vs cutting out

lumpectomy and cutting out both are nouns.

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

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

lumpectomy: surgical removal of a tumor without removing much of the surrounding tissue or lymph nodes; performed in some cases of breast cancer
cutting out: surgical removal of a body part or tissue

Other hypernyms of lumpectomy include ablation, excision, extirpation.

lumpectomy (noun)	cutting out (noun)
surgical removal of a tumor without removing much of the surrounding tissue or lymph nodes; performed in some cases of breast cancer	surgical removal of a body part or tissue