picture vs understand

picture is a noun but understand is not a noun.

Word	Noun	Adjective	Verb	Adverb
picture	Yes	No	Yes	No
understand	No	No	Yes	No

picture (noun)	understand (noun)
a visual representation (of an object or scene or person or abstraction) produced on a surface
graphic art consisting of an artistic composition made by applying paints to a surface
a representation of a person or scene in the form of a print or transparent slide or in digital format
a clear and telling mental image
a typical example of some state or quality
illustrations used to decorate or explain a text
the visible part of a television transmission
a form of entertainment that enacts a story by sound and a sequence of images giving the illusion of continuous movement
a graphic or vivid verbal description
a situation treated as an observable object

picture (verb)	understand (verb)
show in, or as in, a picture	know and comprehend the nature or meaning of
imagine; conceive of; see in one's mind	perceive (an idea or situation) mentally
	believe to be the case
	make sense of a language
	be understanding of