A level is a tool used to determine whether a surface is horizontal (level) or vertical (plumb). Without this, you can't build a house that works well or looks good—not to mention hang kitchen cabinets or trim out a door.

A screed level is a long, narrow tool, primarily used to level concrete floor coatings in a process known as screeding.

Magnetic level gauges use magnetism to link the indicator in a gauge to a float inside of a vessel in order to accurately show the level of fluid within.

A torpedo level is a type of spirit level that is an essential tool for any professional working in tight spaces.

Pastel is not a level.

Pastel (plural pastels):

1. (color) Any of several subdued tints of colors, usually associated with pink, peach, yellow, green, blue, and lavender

2. (art) A drawing made with any of those colors.

3. A type of dried paste used to make crayons.

4. A crayon made from such a paste.

More Info: en.wikipedia.org