Why are there different names for the same kanji radical?

I was wondering why some of the names for kanji radicals are different depending on the source.

For example, right now I'm learning radicals on kaniwani and they called 「丶」 drop, but on my kanji learning app they called it a dot. The terms they call it are similar but still different. I would like to know which source is more credible or reliable to study kanji radicals.