cutter vs glass-cutter

cutter and glass-cutter both are nouns.

Word	Noun	Adjective	Verb	Adverb
cutter	Yes	No	No	No
glass-cutter	Yes	No	No	No

As nouns, glass-cutter is a hyponym of cutter; that is, glass-cutter is a word with a more specific, narrower meaning than cutter:

Other hyponyms of cutter include garment cutter, gem cutter, glass cutter.

cutter (noun)	glass-cutter (noun)
a cutting implement; a tool for cutting	someone who cuts flat glass to size
a boat for communication between ship and shore	someone who cuts or grinds designs on glass
a sailing vessel with a single mast set further back than the mast of a sloop
someone whose work is cutting (as e.g. cutting cloth for garments)
someone who carves the meat
someone who cuts or carves stone