I'm not afraid of heights.

我不恐高。

《柯林斯英汉双解大词典》

And, unlike me, he is not afraid of heights.

不像我，他不怕高。

youdao

Some people are afraid of heights. I'm afraid of widths.

有些人有恐高症，而我有恐宽症（腰围宽了）。

youdao

A more difficult hike is eight kilometers long and not for those afraid of heights.

VOA: special.2009.09.28

We're afraid of spiders, snakes, heights, storms, large animals, darkness, blood, strangers, humiliation, deep water, and leaving home alone.

我们害怕蜘蛛，蛇，高地，暴雨，大型动物，黑暗，血，陌生人，侮辱，深水，独自在家。

耶鲁公开课 - 心理学导论课程节选

I'm afraid of heights.

我怕高。

I'm afraid of 实战 - SpeakingMax英语口语达人

As a child, I was afraid of everything: escalators, heights and New Orleans cockroaches the size of pralines.

NPR: Stepping Out of Fear