What words end in -ub?

There are very few words in the English language that end in "-ub." Here are a few examples:

* Sub (short for submarine)

* Hub (center of a wheel or network)

* Rub (to move something over a surface)

It's worth noting that the "-ub" ending is not particularly common. Most words ending in "-b" have other suffixes attached, such as "-able" or "-ible."