Yes, ICONS is a Scrabble word!

Letter values in Scrabble US: I 1, C 3, O 1, N 1, S 1.

Is it a valid word?

ICONS is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

(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 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