| BEHAVIOURISTIC | • behaviouristic adj. Britain standard spelling of behavioristic. • BEHAVIOURISTIC adj. relating to behaviourism, also BEHAVIORISTIC. |
| CHIVALROUSNESS | • chivalrousness n. The state of being chivalrous. • CHIVALROUS n. gentlemanly, valiant. |
| CLAVICYTHERIUM | • clavicytherium n. (Music) A harpsichord in which the soundboard and strings are mounted vertically facing the player. • CLAVICYTHERIUM n. a harpsichord-like musical instrument. |
| CLISHMACLAVERS | • CLISHMACLAVER n. (Scots) gossip. |
| EXTRAVEHICULAR | • extravehicular adj. Relating to, on happening in, the space outside a vehicle, especially a spacecraft in space. • extra-vehicular adj. Alternative spelling of extravehicular. • EXTRAVEHICULAR adj. taking place outside a vehicle (as a spacecraft). |
| HANDKERCHIEVES | • handkerchieves n. Plural of handkerchief. • HANDKERCHIEF n. a small usually square piece of cloth used for usually personal purposes (as blowing the nose) or as a clothing accessory, also HANDKERCHER. |
| HYPERVIGILANCE | • hypervigilance n. An enhanced state of sensory sensitivity accompanied by an exaggerated intensity of behaviors whose… • HYPERVIGILANCE n. extreme vigilance. |
| MACHIAVELLIANS | • Machiavellians n. Plural of Machiavellian. • MACHIAVELLIAN n. a politically cunning person, also MACHIAVELIAN. |
| NONACHIEVEMENT | • nonachievement n. Something that does not achieve the intended goal. • NONACHIEVEMENT n. something that is not an achievement. |
| SERVOMECHANISM | • servomechanism n. A mechanical device for controlling large amounts of power by means of smaller amounts of power and… • servomechanism n. Any system which controls motion automatically using feedback. • servo-mechanism n. Alternative spelling of servomechanism. |
| SUPERACHIEVERS | • superachievers n. Plural of superachiever. • SUPERACHIEVER n. an extreme achiever. |
| TSESAREVITCHES | • tsesarevitches n. Plural of tsesarevitch. • TSESAREVITCH n. (Russian) the eldest son of a tsar, heir to the tsardom, also CESAREVICH, CESAREVITCH, CESAREWICH, CESAREWITCH, TSAREVITCH, TSESAREVICH, TSESAREWICH, TSESAREWITCH. |
| UNDERACHIEVERS | • underachievers n. Plural of underachiever. • UNDERACHIEVER n. one that fails to attain a predicted level of achievement or does not do as well as expected. |
| UNDERACHIEVING | • underachieving v. Present participle of underachieve. • UNDERACHIEVE v. to achieve less than one's potential. |
| VOUCHSAFEMENTS | • vouchsafements n. Plural of vouchsafement. • VOUCHSAFEMENT n. the act of vouchsafing. |