Greco-Roman architecture vs classical architecture

Greco-Roman architecture and classical architecture both are nouns.

Word	Noun	Adjective	Verb	Adverb
Greco-Roman architecture	Yes	No	No	No
classical architecture	Yes	No	No	No

As nouns, Greco-Roman architecture and classical architecture are synonyms defined as:

Greco-Roman architecture and classical architecture: architecture influenced by the ancient Greeks or Romans

Other synonyms of Greco-Roman architecture include Graeco-Roman architecture.

Greco-Roman architecture (noun)	classical architecture (noun)
architecture influenced by the ancient Greeks or Romans	architecture influenced by the ancient Greeks or Romans