CDR Registered Dietitian (RD) Vocabulary Game
Exam terms with clues and explanations by OpenExamPrep.
About the CDR Registered Dietitian (RD) Vocabulary Game
A free word game for the CDR Registered Dietitian (RD) exam. Each round shows a clue for one of 20 exam terms across 10 topics. Recall the term, spell it out, then read a short explanation. Rounds pick a random term, so you can keep playing as long as you like.
How to Play
- 1Read the clue and type a term with the right number of letters (3 to 6). Abbreviations count: type the letters only.
- 2Press Check Answer or Enter. Each letter changes color to show how close you are.
- 3You have 6 tries. Stuck? Need a hint? asks the AI tutor for a nudge without giving the term away, and Skip moves to a new term.
- 4After the round, read the explanation, ask the AI to explain it, share your result, or press Next.
- ARight letter, right spot
- AIn the term, wrong spot
- ANot in the term
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Topics in the CDR Registered Dietitian (RD) Vocabulary Game
Food and nutrition sciences
Research applications
Nutrition care
Screening and assessment
Planning and intervention
Regulatory compliance
Financial management
Human resource management
Quality management
Sanitation and safety
Sources for these terms (24)
- Nutrition Care Process · Source checked 2026-11-03
- Medical nutrition therapy services · Source checked 2026-11-03
- About Body Mass Index (BMI) · Source checked 2026-11-03
- Anemia · Source checked 2026-11-03
- Edema · Source checked 2026-11-03
- Celiac Disease · Source checked 2026-11-03
- Home Tube Feeding Booklet: Non-Pump Feeding · Source checked 2026-11-03
- Why the DASH Eating Plan Works · Source checked 2026-11-03
- What Is Parenteral Nutrition (IV Nutrition)? · Source checked 2026-11-03
- About CMS · Source checked 2026-11-03
- Acute Inpatient PPS · Source checked 2026-11-03
- About OSHA · Source checked 2026-11-03
- QAPI Description and Background · Source checked 2026-11-03
- Hazard Analysis Critical Control Point (HACCP) · Source checked 2026-11-03
- The Big Thaw — Safe Defrosting Methods · Source checked 2026-11-03
- "Danger Zone" (40°F - 140°F) · Source checked 2026-11-03
- Your Digestive System & How It Works · Source checked 2026-11-03
- Gluten and Food Labeling · Source checked 2026-11-03
- Questions and Answers on the Gluten-Free Food Labeling Final Rule · Source checked 2026-11-03
- About Folic Acid · Source checked 2026-11-03
- IDE Institutional Review Boards (IRB) · Source checked 2026-11-03
- HACCP Principles & Application Guidelines · Source checked 2026-11-03
- FDA Food Code 2026 · Source checked 2026-11-03
- Cooling Cooked Time/Temperature Control for Safety Foods and the FDA Food Code: for Food Employees · Source checked 2026-11-03
About the CDR RD Exam
The CDR RD exam is the credentialing examination for registered dietitian nutritionists. It covers four domains: Principles of Dietetics (21%), Nutrition Care for Individuals and Groups (45%), Management of Food and Nutrition Programs (21%), and Foodservice Systems (13%). The exam is computer-based and administered at Pearson VUE testing centers.
Exam sponsor: CDR (Commission on Dietetic Registration). The requirements and fees below concern the certification or admission exam, separate from our free practice resources.
Assessment
Variable-length assessment
Time Limit
3 hours
Passing Score
Scaled score of 25 (scale 1-50)
Reported exam pass rate: 83.93% within one year of first attempt (2025). All pathways; CDR also publishes first-time rates by pathway This describes exam candidates, not OpenExamPrep users or results from using our resources. Exam sponsor website
Fees, eligibility, and exam policies can change. Confirm them with the exam sponsor before applying or paying.
Frequently Asked Questions
Is the RD vocabulary game free?
Yes. The game is free to play with no sign-up. Signing in adds AI explanations for any term.
How does the RD vocabulary game work?
Each round shows a clue for one of 20 RD terms. Guess the term in six tries: green means the right letter in the right spot, yellow means the letter is in the term but in another spot, and gray means it is not in the term. After the round, read the explanation and play the next term.
Where do the RD terms come from?
OpenExamPrep researched each term from the CDR (Commission on Dietetic Registration) content outline and primary sources, listed under Sources on this page. The game is independent study material, not an official exam resource.
What is the RD exam pass rate?
CDR reports that 83.93% of examinees passed within one year of their first attempt in the year ending 2025. Results vary by pathway: 83.23% for dietetic internships and 85.66% for coordinated programs.
How many questions are on the RD exam?
The CDR RD exam contains 125-145 questions: 100-120 scored plus 25 unscored pretest questions. The exam uses variable length testing, so the number of questions varies based on your performance.