| BUCKJUMPER | • buckjumper n. One who takes part in buckjumping. • buckjumper n. A horse that buckjumps. • BUCKJUMPER n. (Australian) an untamed horse. |
| BUTTERCUPS | • buttercups n. Plural of buttercup. • BUTTERCUP n. a crowfoot (genus Ranunculus), esp. of one of those species that have golden-yellow cup-shaped flowers. |
| EUPHORBIUM | • euphorbium n. An acrid dull yellow or brown resin consisting of the concreted milky juice of several species of Euphorbia… • EUPHORBIUM n. the resinous gum of certain succulent plants of the genus Euphorbia, formerly used as an emetic and purgative. |
| PENUMBROUS | • penumbrous adj. Partially shaded. • penumbrous adj. Vague; ill-defined; unclear. • PENUMBROUS adj. relating to penumbra, partial shade. |
| PSEUDOBULB | • pseudobulb n. A storage organ in orchids, derived from the part of a stem between two leaf nodes. • PSEUDOBULB n. a swollen stem internode in some orchids. |
| PUBERULENT | • puberulent adj. Covered in soft, downy hairs. • PUBERULENT adj. feebly or minutely pubescent; covered with minute down, also PUBERULOUS. |
| PUBERULOUS | • puberulous adj. Puberulent. • PUBERULOUS adj. feebly or minutely pubescent; covered with minute down, also PUBERULENT. |
| RUPTURABLE | • rupturable adj. Capable of being ruptured. • RUPTURABLE adj. that can be ruptured. |
| SUBGROUPED | • subgrouped v. Simple past tense and past participle of subgroup. • SUBGROUP v. to divide into subgroups. |
| SUBOCTUPLE | • suboctuple adj. (Obsolete) Containing one part of eight; in the ratio of one to eight. • SUBOCTUPLE adj. containing one part of eight; having the ratio of one to eight. |
| SUPERCLUBS | • superclubs n. Plural of superclub. • SUPERCLUB n. a very big club. |
| SUPERJUMBO | • superjumbo n. The largest passenger airliner, the Airbus A380. • SUPERJUMBO n. a very large airliner. |
| UPBUILDERS | • UPBUILDER n. one who upbuilds. |
| UPBUOYANCE | • upbuoyance n. (Rare) The act of buoying up; uplifting. • UPBUOYANCE n. the act of buoying up. |