element – a part or aspect of something abstract, especially one that is essential or characteristic. [the tools]
principle – general law with numerous special applications.
line– line is an element with length, width, and directionality. it can be used to outline or make shapes. line can be implied and is not constrained to a single weight.
shape– a two dimensional outline or silhouette. shapes can be geometric, abstract, or organic in construction.
texture– texture indicates the surface quality of an object. graphic objects can actually have a certain texture to them or texture can be implied, making them purely visual.
color– the perception of the visual light spectrum. combining multiple colors and using specific color combinations can create different visual effects.
form – [3d or 4d] the visible shape or configuration of structures or space, forms are described by virtue of the area of space bordered by the lines.
space – [positive or negative] a continuous area or expanse that is to be filled or seen as: available within the environment, or between applied elements.