fess vs fesse

fess and fesse both are nouns.

Word	Noun	Adjective	Verb	Adverb
fess	Yes	No	No	No
fesse	Yes	No	No	No

As nouns, fess and fesse are synonyms defined as:

fess and fesse: (heraldry) an ordinary consisting of a broad horizontal band across a shield

fess (noun)	fesse (noun)
(heraldry) an ordinary consisting of a broad horizontal band across a shield	(heraldry) an ordinary consisting of a broad horizontal band across a shield