arcade vs loggia

arcade and loggia both are nouns.

Word	Noun	Adjective	Verb	Adverb
arcade	Yes	No	No	No
loggia	Yes	No	No	No

As nouns, loggia is a hyponym of arcade; that is, loggia is a word with a more specific, narrower meaning than arcade:

arcade: a structure composed of a series of arches supported by columns
loggia: a roofed arcade or gallery with open sides stretching along the front or side of a building; often at an upper level

arcade (noun)	loggia (noun)
a structure composed of a series of arches supported by columns	a roofed arcade or gallery with open sides stretching along the front or side of a building; often at an upper level
a covered passageway with shops and stalls on either side