knight of the square flag vs banneret

knight of the square flag and banneret both are nouns.

Word	Noun	Adjective	Verb	Adverb
knight of the square flag	Yes	No	No	No
banneret	Yes	No	No	No

As nouns, knight of the square flag and banneret are synonyms defined as:

knight of the square flag and banneret: a knight honored for valor; entitled to display a square banner and to hold higher command

Other synonyms of knight of the square flag include knight banneret.

knight of the square flag (noun)	banneret (noun)
a knight honored for valor; entitled to display a square banner and to hold higher command	a knight honored for valor; entitled to display a square banner and to hold higher command