pince-nez vs specs

pince-nez and specs both are nouns.

Word	Noun	Adjective	Verb	Adverb
pince-nez	Yes	No	No	No
specs	Yes	No	No	No

As nouns, specs is a hypernym of pince-nez; that is, specs is a word with a broader meaning than pince-nez:

pince-nez: spectacles clipped to the nose by a spring
specs: (plural) optical instrument consisting of a frame that holds a pair of lenses for correcting defective vision

Other hypernyms of pince-nez include eyeglasses, glasses, spectacles.

pince-nez (noun)	specs (noun)
spectacles clipped to the nose by a spring	(plural) optical instrument consisting of a frame that holds a pair of lenses for correcting defective vision