candle vs rush candle

candle and rush candle both are nouns.

Word	Noun	Adjective	Verb	Adverb
candle	Yes	No	Yes	No
rush candle	Yes	No	No	No

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

Other hyponyms of candle include chandlery, dip, rushlight, vigil candle, vigil light.

candle (noun)	rush candle (noun)
stick of wax with a wick in the middle	a tallow candle with a rush stem as the wick
the basic unit of luminous intensity adopted under the Systeme International d'Unites; equal to 1/60 of the luminous intensity per square centimeter of a black body radiating at the temperature of 2,046 degrees Kelvin

candle (verb)	rush candle (verb)
examine eggs for freshness by holding them against a light