photography vs block out

photography is a noun but block out is not a noun.

Word	Noun	Adjective	Verb	Adverb
photography	Yes	No	No	No
block out	No	No	Yes	No

photography (noun)	block out (noun)
the act of taking and printing photographs
the occupation of taking and printing photographs or making movies
the process of producing images of objects on photosensitive surfaces

photography (verb)	block out (verb)
	plan where and when songs should be inserted into a theatrical production, or plan a theatrical production in general
	indicate roughly
	shield from light
	prevent from entering