I've noticed several cases in which a re-direct enables a single Wikipedia page to rank number 1 in the SERPs for two different search terms. As a hypothetical example, suppose Wikipedia has a page with the title "Used Widgets", plus another page named "Second-hand Widgets" which re-directs to the "Used Widgets" page. I've recently noticed several cases in which the single page ranks number 1 in Google for searches on both titles.
I've never used many re-directs on my own sites, and never for this purpose. So I'm wondering if anyone else has done it, and how well did it work.