What is the antonym for cowlick?

There isn't a single perfect antonym for "cowlick" because it describes a specific hair pattern, not a general concept. However, depending on the context, you could use words like:

* Smooth: This describes hair that lies flat and without any unruly sections.

* Straight: This emphasizes the lack of any curl or wave that might contribute to a cowlick.

* Manageable: This implies that the hair is easy to style and doesn't require special effort to tame a cowlick.

* Flowing: This describes hair that moves gracefully, which is the opposite of a cowlick's tendency to stick up.

Ultimately, the best antonym will depend on the specific situation and the aspect of the "cowlick" you want to highlight.