| BURRAMUNDIS | • BURRAMUNDI n. (Native Australian) any of several Australian river-fish, also BARRAMUNDA, BARRAMUNDI. |
| GROUNDBURST | • groundburst n. The explosion of a bomb dropped from the air when it hits the ground. • GROUNDBURST n. the detonation of a nuclear warhead at ground level. |
| SURROUNDING | • surrounding v. Present participle of surround. • surrounding n. An outlying area; area in proximity to something. • surrounding n. An environment. |
| SURTURBRAND | • surturbrand n. A fibrous brown coal or bituminous wood. • SURTURBRAND n. (Icelandic) a lignite found interbedded with lavas in Iceland, also SURTARBRAND. |
| TURNAROUNDS | • turnarounds n. Plural of turnaround. • turn-arounds n. Plural of turn-around. • turn␣arounds n. Plural of turn around. |
| UNDERINSURE | • underinsure v. To insure insufficiently. • UNDERINSURE v. to insure insufficiently. |
| UNDERSCRUBS | • UNDERSCRUB n. bushes etc. |
| UNDERSHRUBS | • undershrubs n. Plural of undershrub. • UNDERSHRUB n. a shrub smaller than the usual shrub. |
| UNDERTHRUST | • underthrust v. (Geology, of a tectonic plate) To thrust under another. • UNDERTHRUST v. to insert (a faulted rock mass) into position under a passive rock mass. |
| UNDERTRUMPS | • undertrumps v. Third-person singular simple present indicative form of undertrump. • UNDERTRUMP v. to play a lower trump on a trick to which a higher trump has already been played. |
| UNPRESSURED | • unpressured adj. Not pressured; relaxed. • UNPRESSURED adj. not pressured. |
| UNSURPRISED | • unsurprised adj. Not surprised. • UNSURPRISED adj. not surprised. |
| UNTREASURED | • untreasured adj. Not treasured; unvalued or unbeloved. • untreasured adj. Without treasure; possessing or containing no great prize. • untreasured v. Simple past tense and past participle of untreasure. |