If you can help me find a website that will help me look up words that are associated with home improvement (like injector pump), I would greatly appreciate it.

Thanks in advance.

Here is a reference dictionary, no search feature but many terms
A Dictionary of Common Terms and Definitions used in carpentry, construction, auto repair, plumbing, and home improvement

Don't know if you can do anything with this site
http://www.doityourself.com/