Duolingo English Test Vocabulary Flashcards
The Duolingo English Test is accepted by 4,000+ institutions worldwide. Build the vocabulary you need to score high with AI-powered flashcards and spaced repetition.
How It Works
Three simple steps to start building your DET vocabulary
Choose Your Collection
Pick from curated DET vocabulary sets — high-frequency words, C-Test prep, Interactive Reading & Writing, and more.
Study with Flashcards & Quizzes
Practice with interactive flashcards, multiple choice, fill-in-the-blank, matching games, and dictation exercises.
Track Your Progress
Spaced repetition ensures you review words at the right time. Watch your retention rate climb as you study.
Why DET Vocabulary is Different
The Duolingo English Test uses an adaptive format that adjusts difficulty based on your answers. Its unique question types — especially the C-Test format where you fill in missing letters — demand strong spelling and word recognition skills that go beyond simple vocabulary knowledge.
- Adaptive test — difficulty changes in real time
- C-Test needs strong spelling skills
- Shorter test but vocabulary-intensive
The C-Test Advantage
The C-Test (fill in missing letters) is one of the DET's signature question types. It requires you to recognize partially obscured words and complete them — testing both vocabulary breadth and spelling accuracy simultaneously.
penguen.io uses a scientifically-backed algorithm that shows you each word at the optimal moment — just before you're about to forget it. Combined with our Fill Letters practice mode, you'll build the exact skills the C-Test demands.
Key DET Vocabulary Areas
Targeted vocabulary for each DET question type
Interactive Reading
Build reading comprehension vocabulary for passages that combine reading and writing tasks. Master academic and general English words that appear in DET reading contexts.
Interactive Writing
Expand your productive vocabulary for writing responses. Learn topic-specific words, linking phrases, and opinion expressions for the writing portion.
C-Test & Fill-in
Practice recognizing partially obscured words and completing them accurately. Build the spelling precision and pattern recognition the C-Test demands.
Speaking & Listening
Train your ears and expand your spoken vocabulary. Practice words you'll need for the speaking sample and listening comprehension tasks.
6 Practice Modes
Multiple practice modes engage different parts of your brain — Fill Letters directly mimics the C-Test format
Flashcards
Classic flip cards with spaced repetition scheduling
Multiple Choice
Test your recognition with four answer options
Fill in the Blanks
Type the correct word — directly mimics the DET C-Test format
Matching
Match words to definitions against the clock
Dictation
Listen and type — train your ear for Listening tasks
Listen & Choose
Hear the word, pick the right meaning
Related Resources
Explore more ways to prepare for your English exam
IELTS Vocabulary Flashcards
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TOEFL Vocabulary Flashcards
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English Vocabulary Builder
Comprehensive guide to building English vocabulary beyond exam preparation.
DET Vocabulary FAQ
How many words do I need for the Duolingo English Test? expand_more
Is penguen.io free for DET prep? expand_more
What DET score do universities require? expand_more
How is DET different from IELTS/TOEFL? expand_more
Start Your DET Vocabulary Journey
Don't let vocabulary hold back your Duolingo English Test score. Study smarter with flashcards and spaced repetition — free to start.