noncoding DNA vs intron

noncoding DNA and intron both are nouns.

Word	Noun	Adjective	Verb	Adverb
noncoding DNA	Yes	No	No	No
intron	Yes	No	No	No

As nouns, noncoding DNA and intron are synonyms defined as:

noncoding DNA and intron: sequence of a eukaryotic gene's DNA that is not translated into a protein

noncoding DNA (noun)	intron (noun)
sequence of a eukaryotic gene's DNA that is not translated into a protein	sequence of a eukaryotic gene's DNA that is not translated into a protein