radiation vs phototherapy

phototherapy vs radiation

radiation and phototherapy both are nouns.

Word	Noun	Adjective	Verb	Adverb
radiation	Yes	No	No	No
phototherapy	Yes	No	No	No

As nouns, phototherapy is a hyponym of radiation; that is, phototherapy is a word with a more specific, narrower meaning than radiation:

radiation: (medicine) the treatment of disease (especially cancer) by exposure to a radioactive substance
phototherapy: the use of strong light to treat acne or hyperbilirubinemia of the newborn

Other hyponyms of radiation include Curietherapy, radium therapy, X-ray therapy.

radiation (noun)	phototherapy (noun)
the act of spreading outward from a central source	the use of strong light to treat acne or hyperbilirubinemia of the newborn
(medicine) the treatment of disease (especially cancer) by exposure to a radioactive substance
a radial arrangement of nerve fibers connecting different parts of the brain
the spread of a group of organisms into new habitats
energy that is radiated or transmitted in the form of rays or waves or particles
the spontaneous emission of a stream of particles or electromagnetic rays in nuclear decay
syndrome resulting from exposure to ionizing radiation (e.g., exposure to radioactive chemicals or to nuclear explosions); low doses cause diarrhea and nausea and vomiting and sometimes loss of hair; greater exposure can cause sterility and cataracts and some forms of cancer and other diseases; severe exposure can cause death within hours

Difference between radiation and phototherapy

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