race runner vs six-lined racerunner

race runner and six-lined racerunner both are nouns.

Word	Noun	Adjective	Verb	Adverb
race runner	Yes	No	No	No
six-lined racerunner	Yes	No	No	No

As nouns, race runner and six-lined racerunner are synonyms defined as:

race runner and six-lined racerunner: very swift lizard of eastern and central United States

Other synonyms of race runner include Cnemidophorus sexlineatus, racerunner.

race runner (noun)	six-lined racerunner (noun)
very swift lizard of eastern and central United States	very swift lizard of eastern and central United States