radiotherapy vs actinotherapy

radiotherapy and actinotherapy both are nouns.

Word	Noun	Adjective	Verb	Adverb
radiotherapy	Yes	No	No	No
actinotherapy	Yes	No	No	No

As nouns, radiotherapy and actinotherapy are synonyms defined as:

radiotherapy and actinotherapy: (medicine) the treatment of disease (especially cancer) by exposure to a radioactive substance

Other synonyms of radiotherapy include irradiation, radiation, radiation therapy.

radiotherapy (noun)	actinotherapy (noun)
(medicine) the treatment of disease (especially cancer) by exposure to a radioactive substance	(medicine) the treatment of disease (especially cancer) by exposure to a radioactive substance