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Vocabulary Genius, Learn and Remember More Words Logo
Vocabulary Genius, Learn and Remember More Words Logo

How It Works

Vocabulary Genius predicts how well you know every word in the English language.

Choose a list, and Vocabulary Genius will teach you the "best" words first, which are the most common words that it thinks you don’t know yet.

Vocabulary Genius repeats words at just the right time, before you’re likely to forget them, in order to maximize retention.

Vocabulary Genius uses innovative algorithms based on the spaced repetition learning theory. It understands that you forget with time.

Tip: As you complete lessons in Class Ace, Vocabulary Genius updates its ‘knowledge model’ of what you know. It tracks your positive and negative interactions with each word. This all helps you learn more in less time.

US English vocabulary size by age diagram

Why Improve your Vocabulary?

Improving your vocabulary helps you: get better grades, improve your reading comprehension, understand more of the world, be more credible, get into better schools, get better jobs, earn more money, and be more convincing.

Vocabulary Facts

  • The English language has over 1,000,000 total words.
  • Only 170,000 of them are currently in use.
  • Most adult native English speakers know 20,000-40,000 words.
  • In all of his published works, Shakespear used 17,677 different words. He was credited with either inventing or being the first to write as many as 1,700 of them.
Vocabulary List background graphic
Vocabulary List background graphic

Top 20,000 Words, Part 18

The average person knows 20-40,000 words. Expand your vocabulary with part 18 of our top 20k English most common words lists.

After you review, complete the practice. It'll help you remember these words for longer.

1.

acacia

a tree or shrub of warm climates which bears spikes or clusters of yellow or white flowers and is typically thorny.

17,001st most common English word
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2.

fang

a large sharp tooth, especially a canine tooth of a dog or wolf.

"the dog was bounding towards him, its fangs bared"

17,002nd most common English word
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3.

grizzlies

an animal of a large race of the brown bear native to North America.

17,003rd most common English word
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4.

methadone

a powerful synthetic analgesic drug which is similar to morphine in its effects but less sedative and is used as a substitute drug in the treatment of morphine and heroin addiction.

17,004th most common English word
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