Objectives
The purposes of this study were to identify the difference between consumer vocabulary and medical vocabulary in terms of health information; to understand the features of consumer vocabulary; and to contribute by building a system that is able to link consumer vocabulary with medical vocabulary.

Methods: Data collection was conducted using articles in the knowledge corner of a portal web-site. A total of 43,304 health-related terms (total terms extracted) were collected as objects of this study and these terms were analyzed for their mapping rate and frequency of use (the repeated number of a term).

Results: The rate of mapping between the consumer vocabulary for health information and the medical vocabulary was not high. However, the number of "unmapped terms" was decreased by linking terms having similar forms to "preferred terms" and by extending synonyms.

Conclusion: Linking with preferred terms and extending synonyms are, thus, required to increase the mapping rate between consumer vocabulary for health information and medical vocabulary, and the terms that consumers use are essential to further be researched in order to understand their morphology and features; hence, increasing consumer accessibility to the medical field.