Charts displaying word roots, prefixes and suffixes are available at BetterEndings.org, LearnThat.org, PrefixSuffix.com and ReadingRockets.org. These websites provide word roots, prefixes and suffixes as well as definitions, examples and, in some cases, origin.
A word root is the basis of a word but is unable to stand alone, such as the root "rupt," as in disrupt or rupture. A root word is the basis of a word but is able to stand alone such as the word "form," as in conform or formulate. Adding affixes to a word root or root word changes the meaning of the word. An affix at the beginning of a word or root is a prefix, while an affix at the end of a word or root is a suffix.