needlefish vs pipefish

needlefish and pipefish both are nouns.

Word	Noun	Adjective	Verb	Adverb
needlefish	Yes	No	No	No
pipefish	Yes	No	No	No

As nouns, needlefish and pipefish are synonyms defined as:

needlefish and pipefish: fish with long tubular snout and slim body covered with bony plates

needlefish (noun)	pipefish (noun)
fish with long tubular snout and slim body covered with bony plates	fish with long tubular snout and slim body covered with bony plates
elongate European surface-dwelling predacious fishes with long toothed jaws; abundant in coastal waters