beacon vs signal light

beacon and signal light both are nouns.

Word	Noun	Adjective	Verb	Adverb
beacon	Yes	No	Yes	No
signal light	Yes	No	No	No

As nouns, signal light is a hyponym of beacon; that is, signal light is a word with a more specific, narrower meaning than beacon:

beacon: a fire (usually on a hill or tower) that can be seen from a distance
signal light: a fire set as a signal

Other hyponyms of beacon include signal fire.

beacon (noun)	signal light (noun)
a radio station that broadcasts a directional signal for navigational purposes	a fire set as a signal
a tower with a light that gives warning of shoals to passing ships
a fire (usually on a hill or tower) that can be seen from a distance

beacon (verb)	signal light (verb)
guide with a beacon
shine like a beacon