looper vs measuring worm

looper and measuring worm both are nouns.

Word	Noun	Adjective	Verb	Adverb
looper	Yes	No	No	No
measuring worm	Yes	No	No	No

As nouns, looper and measuring worm are synonyms defined as:

looper and measuring worm: small hairless caterpillar having legs on only its front and rear segments; mostly larvae of moths of the family Geometridae

Other synonyms of looper include inchworm.

looper (noun)	measuring worm (noun)
small hairless caterpillar having legs on only its front and rear segments; mostly larvae of moths of the family Geometridae	small hairless caterpillar having legs on only its front and rear segments; mostly larvae of moths of the family Geometridae