beacon vs signal fire

beacon and signal fire both are nouns.

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

As nouns, signal fire is a hyponym of beacon; that is, signal fire 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 fire: a fire set as a signal

Other hyponyms of beacon include signal light.

beacon (noun)	signal fire (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 fire (verb)
guide with a beacon
shine like a beacon