Master TOEFL Vocabulary with Smart Flashcards
Build academic vocabulary for the TOEFL iBT. Study the words that actually appear in Reading passages and Listening lectures.
How It Works
Three simple steps to start building your TOEFL vocabulary
Choose Your Collection
Pick from curated TOEFL vocabulary sets — Academic Word List, Reading passages, Listening lectures, 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 TOEFL Vocabulary Matters
TOEFL uses academic English exclusively. Unlike everyday English, the vocabulary in TOEFL passages comes from university lectures, textbooks, and research papers. Vocabulary directly affects your score across all four sections — Reading, Listening, Speaking, and Writing.
- Academic English focus
- All 4 sections need vocabulary
- Spaced repetition beats cramming
The Science Behind It
Integrated tasks on the TOEFL require productive vocabulary — you need to not just recognize words but use them accurately in your spoken and written responses.
penguen.io uses a scientifically-backed algorithm that shows you each word at the optimal moment — just before you're about to forget it. You study less but remember more, building a permanent vocabulary that stays with you on exam day and beyond.
Vocabulary for Every TOEFL Section
Curated collections targeting each part of the TOEFL iBT exam
Reading
Master academic vocabulary from passages on natural science, social science, and the arts. Learn context clues and synonyms that help you answer inference and vocabulary-in-context questions.
Listening
Build your recognition vocabulary for university lectures and campus conversations. Focus on academic discourse markers, transition words, and discipline-specific terminology.
Speaking
Expand your active vocabulary for independent and integrated speaking tasks. Learn how to paraphrase lecture content and express opinions with precise academic language.
Writing
Learn advanced linking words, hedging language, and topic vocabulary for integrated essays and academic discussion tasks on education, technology, environment, and more.
6 Ways to Build Your Vocabulary
Multiple practice modes engage different parts of your brain for deeper learning
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 to build active recall
Matching
Match words to definitions against the clock
Dictation
Listen and type — train your ear for Listening
Listen & Choose
Hear the word, pick the right meaning
Related Resources
Explore more ways to prepare for your TOEFL exam
IELTS Vocabulary Flashcards
Master IELTS vocabulary with smart flashcards and spaced repetition.
The Science of Spaced Repetition
Learn why spaced repetition is the most effective way to build long-term vocabulary.
English Vocabulary Builder
Comprehensive guide to building English vocabulary beyond exam preparation.
TOEFL Vocabulary FAQ
How many TOEFL words do I need to know? expand_more
Is penguen.io free for TOEFL prep? expand_more
What's the difference between TOEFL and IELTS vocabulary? expand_more
How long should I study before the TOEFL exam? expand_more
Start Your TOEFL Vocabulary Journey
Don't let vocabulary hold back your TOEFL score. Study smarter with flashcards and spaced repetition — free to start.