breadstick vs bread-stick

breadstick and bread-stick both are nouns.

Word	Noun	Adjective	Verb	Adverb
breadstick	Yes	No	No	No
bread-stick	Yes	No	No	No

As nouns, breadstick and bread-stick are synonyms defined as:

breadstick and bread-stick: a crisp stick-shaped roll; often served with soup

breadstick (noun)	bread-stick (noun)
a crisp stick-shaped roll; often served with soup	a crisp stick-shaped roll; often served with soup