lettuce vs bread

lettuce and bread both are nouns.

Word	Noun	Adjective	Verb	Adverb
lettuce	Yes	No	No	No
bread	Yes	No	Yes	No

As nouns, lettuce and bread are synonyms defined as:

lettuce (noun)	bread (noun)
leaves of any of various plants of Lactuca sativa	food made from dough of flour or meal and usually raised with yeast or baking powder and then baked
any of various plants of the genus Lactuca	informal terms for money
informal terms for money

lettuce (verb)	bread (verb)
	cover with bread crumbs