summer savory vs summer savoury

summer savory and summer savoury both are nouns.

Word	Noun	Adjective	Verb	Adverb
summer savory	Yes	No	No	No
summer savoury	Yes	No	No	No

As nouns, summer savory and summer savoury are synonyms defined as:

summer savory and summer savoury: herb with delicately flavored leaves with many uses

summer savory (noun)	summer savoury (noun)
herb with delicately flavored leaves with many uses	herb with delicately flavored leaves with many uses
erect annual herb with oval leaves and pink flowers; used to flavor e.g. meats or soups or salads; southeastern Europe and naturalized elsewhere