Below are some links to Investment and Real Estate Terms

InvestorWords.com glossary of Real Estate terms
http://www.investorwords.com/cgi-bin/bysubject.cgi?18

InvestoPedia.com glossary of Real Estate Terms
http://www.investopedia.com/categories/realestate.asp

ProU.net online Real Estate Glossary
http://www.prou.net/utilities/glossary/glossary01.html

WebVest
http://www.webvest.info/glossary/