loupe vs jeweler's loupe

loupe and jeweler's loupe both are nouns.

Word	Noun	Adjective	Verb	Adverb
loupe	Yes	No	No	No
jeweler's loupe	Yes	No	No	No

As nouns, loupe and jeweler's loupe are synonyms defined as:

loupe and jeweler's loupe: small magnifying glass (usually set in an eyepiece) used by jewelers and horologists

loupe (noun)	jeweler's loupe (noun)
small magnifying glass (usually set in an eyepiece) used by jewelers and horologists	small magnifying glass (usually set in an eyepiece) used by jewelers and horologists