These two are joined by several others in having colloquial names:

Naming convention, multiple-word identifiers

I've seen kebab-case used in Scheme. It is also convenient in domain names, though there are some sound arguments in favor of registering both the hyphenated and non-hyphenated version of a given domain. One reason is that it's hard, in an audio advertisement, to specify the hyphen without making that the most memorable part of the domain.