handset vs French telephone

handset and French telephone both are nouns.

Word	Noun	Adjective	Verb	Adverb
handset	Yes	No	No	No
French telephone	Yes	No	No	No

As nouns, handset and French telephone are synonyms defined as:

handset and French telephone: telephone set with the mouthpiece and earpiece mounted on a single handle

handset (noun)	French telephone (noun)
telephone set with the mouthpiece and earpiece mounted on a single handle	telephone set with the mouthpiece and earpiece mounted on a single handle