icon vs picture

icon and picture both are nouns.

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

As nouns, icon and picture are synonyms defined as:

icon and picture: a visual representation (of an object or scene or person or abstraction) produced on a surface

Other synonyms of icon include ikon, image.

As nouns, picture is a hypernym of icon; that is, picture is a word with a broader meaning than icon:

icon: a conventional religious painting in oil on a small wooden panel; venerated in the Eastern Church
picture: graphic art consisting of an artistic composition made by applying paints to a surface

Other hypernyms of icon include painting.

icon (noun)	picture (noun)
a visual representation (of an object or scene or person or abstraction) produced on a surface	a visual representation (of an object or scene or person or abstraction) produced on a surface
a conventional religious painting in oil on a small wooden panel; venerated in the Eastern Church	graphic art consisting of an artistic composition made by applying paints to a surface
(computer science) a graphic symbol (usually a simple picture) that denotes a program or a command or a data file or a concept in a graphical user interface	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

icon (verb)	picture (verb)
	show in, or as in, a picture
	imagine; conceive of; see in one's mind