thermocautery vs cauterisation

thermocautery and cauterisation both are nouns.

Word	Noun	Adjective	Verb	Adverb
thermocautery	Yes	No	No	No
cauterisation	Yes	No	No	No

As nouns, cauterisation is a hypernym of thermocautery; that is, cauterisation is a word with a broader meaning than thermocautery:

thermocautery: cautery (destruction of tissue) by heat
cauterisation: the act of coagulating blood and destroying tissue with a hot iron or caustic agent or by freezing

Other hypernyms of thermocautery include cauterization, cautery.

thermocautery (noun)	cauterisation (noun)
cautery (destruction of tissue) by heat	the act of coagulating blood and destroying tissue with a hot iron or caustic agent or by freezing