which paradigms does bash support

As a programming language which paradigms does bash support. Declarative, procedural, imperative?

how to search for commands

How do you search for commands? In powershell you have the get-command cmdlet. Is there anything equivalent in unix?

Re: how to search for commands

hmm. but can I use a wildcard with any of them. For example search for all commands which contain the word "nice". Which would bring up ionice.