| A | B |
|---|
| monologue | a long speech given by a character in a story, movie, play, etc.; a speech given by a performer, such as a comedian |
| monotone | a way of talking or singing without raising or lowering the sound of your voice; talking in one tone of voice |
| monotonous | used to describe something that is boring because it is always the same |
| unison | the act of saying or singing something together at the same time; as one |
| unicorn | an imaginary animal that looks like a horse and has one straight horn growing from the middle of its forehead |
| unify | to cause people or things to be joined or brought together |
| unique | used to say that something or someone is unlike anything or anyone else; special or unusual |
| solitude | a state or situation in which you are alone, usually because you want to be |
| solo | a piece of music that is performed by one singer or musician; something that is done without another person |
| solar | of or relating to the sun, which there is only one of |
| bicycle | a vehicle with two wheels that a person rides by pushing on foot pedals |
| bilingual | able to speak and understand two languages |
| biannual | happening twice a year |
| duet | a piece of music that is performed by two singers or musicians |
| duplex | a building that is divided into two separate homes |
| dual | having two different parts, uses, etc.; having two of something |
| ambidextrous | able to use both hands equally well |
| ambivalent | having or showing very different feelings (such as love and hate) about someone or something at the same time |
| ambiguous | able to be understood in more than one way; having more than one possible meaning |
| amphibious | able to function or live both on land and in water |
| triathlon | a long-distance race that has three parts: swimming, bicycling, and running |
| trilogy | a series of three novels, movies, etc., that are closely related and involve the same characters of themes |
| trimester | a period of three months; one of three periods into which a school year is sometimes divided |
| trident | a fishing spear that has three points and that looks like a large fork |
| quadrangle | a flat shape that has four sides and four angles |
| quartet | a group of four singers or musicians who perform together |
| quart | a US customary unit of measurement for liquids;4 quarts equals a gallon |
| pentagon | a flat shape that has five sides and five corners |
| pentagram | a shape that is like a star with five points formed by five straight lines |
| quintuplet | one of five babies that are born at the same time to the mother |
| hexagon | a 2-dimensional figure that has six angles and six sides |
| sextant | a sixth of a circle; an instrument used to determine the position of a ship or airplane by measuring the positions of the stars and sun |
| September | The ninth month or the year, formerly the seventh |
| septennial | lasting for seven years; happening once every seven years |
| septet | a group of seven singers or musicians who perform together; a piece of music that is meant to be performed by seven people |
| septuagenarian | a person who is between 70 and 79 years old |
| octagon | a flat shape that has eight sides and eight angles |
| octave | a group of eight, such as eight lines or eight musical notes |
| October | the tenth month of the year, formerly the eighth |
| octopus | a sea animal that has a soft and eight long arms |
| November | the eleventh month of the year, formerly the ninth |
| nonagon | a nine-sided polygon |
| decade | a period of ten years |
| decimeter | one tenth of a meter; ten centimeter |
| decimal | based on the number 10 |
| century | a period of 100 years |
| percent | one part in a hundred; and amount that is equal to one one-hundredth |
| centigrade | relating to the temperature scale in which the boiling point of water is at 100 degrees and freezing point of water is at 0 degrees |
| centurion | an officer in the ancient Roman army, which originally had one hundred men |
| centimeter | a length equal to 1/100 meter; ten millimeters |
