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42,394 words to explore
1,392 words
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resonance
Stronger vibration that happens when an object is shaken at its natural frequency.
resource
assets or materials
respectively
individually or separately as mentioned
respiratory
Related to breathing or the lungs.
respiratory system
The organs, such as the lungs, that help the body take in air.
respond
To reply or react to something.
response
Reaction to someone or something; a reply.
restrain
Holding back or limiting movement.
retain
To keep possession of something.
revolve
To move in a circle around a point.
rhetoric
The art of effective speaking or writing.
ritual
A series of actions performed in a specific order.
roll up one's sleeves
to prepare for hard work.
roommate
A person with whom one shares a room.
rotate
To turn around a central point or axis.
rough it
To live without normal comforts for a short time, as when camping.
rsvp
To respond to an invitation.
rub in
to emphasize or make someone feel worse
rub the wrong way
To annoy or bother someone, often without meaning to.
rubric
a guide for assessment or grading
run across
To find or meet by chance.
run for
To compete in an election for an official position.
run into
To meet someone by chance.
run out of
To use all of something so none is left.
Words selected by Inoh for the TOEFL iBT test. Not an official ETS list. How these words were chosen →