key pattern vs Greek fret

key pattern and Greek fret both are nouns.

Word	Noun	Adjective	Verb	Adverb
key pattern	Yes	No	No	No
Greek fret	Yes	No	No	No

As nouns, key pattern and Greek fret are synonyms defined as:

key pattern and Greek fret: an ornamental pattern consisting of repeated vertical and horizontal lines (often in relief)

Other synonyms of key pattern include fret, Greek key.

key pattern (noun)	Greek fret (noun)
an ornamental pattern consisting of repeated vertical and horizontal lines (often in relief)	an ornamental pattern consisting of repeated vertical and horizontal lines (often in relief)