General:
* Squiggle: This is a general term for any wavy or irregular line.
* Scribble: This term suggests a casual, unplanned mark.
* Doodle: This term implies a drawing made while thinking or daydreaming.
* Wiggle: This term emphasizes the movement and fluidity of the mark.
Specific types:
* Wave: A smooth, undulating line.
* Zigzag: A series of sharp angles.
* Spiral: A curved line that circles around a central point.
* Swoosh: A curved line that suggests motion.
* Tilde: A symbol used in linguistics and computer science.
Other:
* Symbol: If the squiggly mark has a specific meaning.
* Glyph: If the squiggly mark is part of a written language.
Ultimately, the best way to describe a squiggly mark is to provide more context. For example, you could say "a squiggly line like a worm" or "a squiggly symbol representing a musical note."