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Test Prep
Most Common Words
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.
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.
Top 20,000 Words, Part 16
The average person knows 20-40,000 words. Expand your vocabulary with part 16 of our top 20k English most common words lists.
After you review, complete the practice. It'll help you remember these words for longer.
grub
the larva of an insect, especially a beetle.
"my onions are ruined by small grubs eating the roots"
synonyms
larva, maggot, caterpillar
ulcer
an open sore on an external or internal surface of the body, caused by a break in the skin or mucous membrane which fails to heal. Ulcers range from small, painful sores in the mouth to bedsores and serious lesions of the stomach or intestine.
synonyms
sore, ulceration, open sore
cambodian
a native or inhabitant of Cambodia, or a person of Cambodian descent.
interagency
occurring between different agencies.
"inter-agency cooperation"