lumpectomy vs ablation

lumpectomy and ablation both are nouns.

Word	Noun	Adjective	Verb	Adverb
lumpectomy	Yes	No	No	No
ablation	Yes	No	No	No

As nouns, ablation is a hypernym of lumpectomy; that is, ablation 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
ablation: surgical removal of a body part or tissue

Other hypernyms of lumpectomy include cutting out, excision, extirpation.

lumpectomy (noun)	ablation (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
	the erosive process that reduces the size of glaciers