In English you almost always pronounce an H at the start of the word. In fact I ...

LeonidasXIV · on Feb 22, 2022

Herb, whether you pronounce the H depends on whether you speak British or American English.

mumblemumble · on Feb 22, 2022

Honor, heir, honest. Together with herb and hour, those are the only ones I can think of.

SilasX · on Feb 22, 2022

Also homage. This page gives a list, which is just those plus derivatives:

BrandoElFollito · on Feb 22, 2022

That's a good point - thanks. This would explain "hour" in OP case.