Magic Marker vs felt-tip pen

Magic Marker and felt-tip pen both are nouns.

Word	Noun	Adjective	Verb	Adverb
Magic Marker	Yes	No	No	No
felt-tip pen	Yes	No	No	No

As nouns, Magic Marker and felt-tip pen are synonyms defined as:

Magic Marker and felt-tip pen: a pen with a writing tip made of felt (trade name Magic Marker)

Other synonyms of Magic Marker include felt-tipped pen, felt tip.

Magic Marker (noun)	felt-tip pen (noun)
a pen with a writing tip made of felt (trade name Magic Marker)	a pen with a writing tip made of felt (trade name Magic Marker)