beam of light vs shaft of light

beam of light and shaft of light both are nouns.

Word	Noun	Adjective	Verb	Adverb
beam of light	Yes	No	No	No
shaft of light	Yes	No	No	No

As nouns, beam of light and shaft of light are synonyms defined as:

Other synonyms of beam of light include beam, irradiation, light beam, ray, ray of light, shaft.

beam of light (noun)	shaft of light (noun)
a column of light (as from a beacon)	a column of light (as from a beacon)