written language vs leaf

written language and leaf both are nouns.

Word	Noun	Adjective	Verb	Adverb
written language	Yes	No	No	No
leaf	Yes	No	Yes	No

written language (noun)	leaf (noun)
communication by means of written symbols (either printed or handwritten)	hinged or detachable flat section (as of a table or door)
	a sheet of any written or printed material (especially in a manuscript or book)
	the main organ of photosynthesis and transpiration in higher plants

written language (verb)	leaf (verb)
	produce leaves, of plants
	turn over pages
	look through a book or other written material