sunray vs light beam

sunray and light beam both are nouns.

Word	Noun	Adjective	Verb	Adverb
sunray	Yes	No	No	No
light beam	Yes	No	No	No

As nouns, light beam is a hypernym of sunray; that is, light beam is a word with a broader meaning than sunray:

Other hypernyms of sunray include beam, beam of light, irradiation, ray, ray of light, shaft, shaft of light.

sunray (noun)	light beam (noun)
a ray of sunlight	a column of light (as from a beacon)
a ray of artificial ultraviolet light from a sunray lamp
herb having a basal cluster of grey-green leaves and leafless stalks each with a solitary broad yellow flower head; desert areas Idaho to Arizona