bar sinister vs bend sinister

bar sinister and bend sinister both are nouns.

Word	Noun	Adjective	Verb	Adverb
bar sinister	Yes	No	No	No
bend sinister	Yes	No	No	No

As nouns, bar sinister and bend sinister are synonyms defined as:

bar sinister and bend sinister: a mark of bastardy; lines from top right to bottom left

bar sinister (noun)	bend sinister (noun)
a mark of bastardy; lines from top right to bottom left	a mark of bastardy; lines from top right to bottom left
the status of being born to parents who were not married