leaf vs greenery

leaf and greenery both are nouns.

Word	Noun	Adjective	Verb	Adverb
leaf	Yes	No	Yes	No
greenery	Yes	No	No	No

As nouns, greenery is a hyponym of leaf; that is, greenery is a word with a more specific, narrower meaning than leaf:

leaf (noun)	greenery (noun)
hinged or detachable flat section (as of a table or door)	green foliage
a sheet of any written or printed material (especially in a manuscript or book)
the main organ of photosynthesis and transpiration in higher plants

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