lateral line organ vs lateral line

lateral line organ and lateral line both are nouns.

Word	Noun	Adjective	Verb	Adverb
lateral line organ	Yes	No	No	No
lateral line	Yes	No	No	No

As nouns, lateral line organ and lateral line are synonyms defined as:

lateral line organ and lateral line: sense organs of fish and amphibians; believed to detect pressure changes in the water

lateral line organ (noun)	lateral line (noun)
sense organs of fish and amphibians; believed to detect pressure changes in the water	sense organs of fish and amphibians; believed to detect pressure changes in the water