The word "outliner" has several synonyms that can be used to express the same or similar meaning. One common synonym is "sketcher," which refers to someone who creates a preliminary drawing or outline of a design or idea. "Diagrammer" is another synonym that describes a person who creates a visual representation of a concept or information. Other synonyms for "outliner" include "planner," "draftsman," "blueprinter," and "mapmaker." Each of these words suggest someone who is organized, methodical, and detail-oriented in their work, and who is able to break down complex ideas into simpler, more manageable components.