ablation vs surgical operation

ablation and surgical operation both are nouns.

Word	Noun	Adjective	Verb	Adverb
ablation	Yes	No	No	No
surgical operation	Yes	No	No	No

As nouns, surgical operation is a hypernym of ablation; that is, surgical operation is a word with a broader meaning than ablation:

ablation: surgical removal of a body part or tissue
surgical operation: a medical procedure involving an incision with instruments; performed to repair damage or arrest disease in a living body

Other hypernyms of ablation include operation, surgery, surgical procedure, surgical process.

ablation (noun)	surgical operation (noun)
surgical removal of a body part or tissue	a medical procedure involving an incision with instruments; performed to repair damage or arrest disease in a living body
the erosive process that reduces the size of glaciers