| UNDOUBTFUL | • undoubtful adj. Not doubtful. • UNDOUBTFUL adj. not doubtful. |
| UNAMBIGUOUS | • unambiguous adj. Clear, and having no uncertainty or ambiguity. • UNAMBIGUOUS adj. not ambiguous. |
| UNSLUMBROUS | • unslumbrous adj. (Archaic, poetic) sleepless. • UNSLUMBROUS adj. not slumbrous. |
| CUMULONIMBUS | • cumulonimbus n. (Meteorology) A cloud, with a tall structure and a flat base, that is often associated with thunderstorms. • cumulo-nimbus n. Alternative form of cumulonimbus. • CUMULONIMBUS n. a type of cloud. |
| RUMBUNCTIOUS | • rumbunctious adj. Alternative spelling of rambunctious. • RUMBUNCTIOUS adj. boisterous, unruly, also RAMBUNCTIOUS. |
| SUBCUTANEOUS | • subcutaneous adj. Pertaining to the fatty layer under the skin. • SUBCUTANEOUS adj. beneath the skin. |
| SUBBITUMINOUS | • subbituminous adj. Partly or imperfectly bituminous. • SUBBITUMINOUS adj. of, relating to, or being coal of lower rank than bituminous coal but higher than lignite. |
| SUBCONTIGUOUS | • subcontiguous adj. Almost touching. • SUBCONTIGUOUS adj. partially contiguous. |
| SUBCONTINUOUS | • subcontinuous adj. Nearly continuous, but with slight interruptions. • SUBCONTINUOUS adj. partially continuous. |
| UNAMBIGUOUSLY | • unambiguously adv. In a manner that is not ambiguous; leaving no doubt; clearly. • UNAMBIGUOUS adv. not ambiguous. |
| CUMULONIMBUSES | • cumulonimbuses n. Plural of cumulonimbus. • CUMULONIMBUS n. a type of cloud. |
| LUGUBRIOUSNESS | • lugubriousness n. The property of being lugubrious. • LUGUBRIOUS n. mournful, dismal, esp. in an exaggerated or affected manner. |
| SUBCUTANEOUSLY | • subcutaneously adv. Under the cutaneous layer of the skin. • SUBCUTANEOUS adv. beneath the skin. |
| UBIQUITOUSNESS | • ubiquitousness n. The state or property of being ubiquitous. • ubiquitousness n. The state of being everywhere at any given time. • UBIQUITOUS n. being everywhere at once, also UBIQUITARY. |
| UNSURMOUNTABLE | • unsurmountable adj. (Archaic, rare) insurmountable. • UNSURMOUNTABLE adj. not surmountable. |
| ANTITUBERCULOUS | • antituberculous adj. (Pharmacology) Acting to combat or counteract tuberculosis. • ANTITUBERCULOUS adj. designed to counter tuberculosis. |
| RUMBUSTIOUSNESS | • rumbustiousness n. The state or condition of being rumbustious. • RUMBUSTIOUSNESS n. the state of being rumbustious. |