| FLOODPLAINS | • floodplains n. Plural of floodplain. • flood␣plains n. Plural of flood plain. • FLOODPLAIN n. an area bordering a stream over which water spreads when the stream tops its channel banks. |
| FOREPERSONS | • forepersons n. Plural of foreperson. |
| FORTEPIANOS | • fortepianos n. Plural of fortepiano. • FORTEPIANO n. the eighteenth century name for an early type of piano; a fortepiano note. |
| OPSONIFYING | • opsonifying v. Present participle of opsonify. • OPSONIFY v. to form opsonins in, a substance of blood serum making bacteria vulnerable to phagocytic action. |
| PIANOFORTES | • pianofortes n. Plural of pianoforte. • piano-fortes n. Plural of piano-forte. • PIANOFORTE n. (Italian) a large keyboard musical instrument. |
| POLYOLEFINS | • polyolefins n. Plural of polyolefin. • POLYOLEFIN n. a polymer of an alkene (as polyethylene). |
| POSTFORMING | • postforming v. Present participle of postform. • POSTFORM v. to shape subsequently. |
| PROFESSIONS | • professions n. Plural of profession. • PROFESSION n. a calling. |
| PROFOUNDEST | • profoundest adj. Superlative form of profound: most profound. • PROFOUND adj. very deep. |
| PUFTALOONAS | • PUFTALOON n. (Australian) a type of fried cake, eaten hot with jam, honey or sugar, also PUFFTALOONAS, PUFTALOONIES. |
| SOUNDPROOFS | • soundproofs v. Third-person singular simple present indicative form of soundproof. • SOUNDPROOF v. to insulate so as to obstruct the passage of sound. |
| SPOONDRIFTS | • spoondrifts n. Plural of spoondrift. • spoon-drifts n. Plural of spoon-drift. • SPOONDRIFT n. the ocean spray which is blown by the wind, also SPINDRIFT. |
| TEASPOONFUL | • teaspoonful n. A unit of capacity equal to the amount a teaspoon can hold which is taken approximately as 5 ml. • TEASPOONFUL n. the contents of a teaspoon. |
| THORNPROOFS | • thornproofs n. (Dated) Thornproof trousers. • THORNPROOFS n. garments that resist penetration by thorns. |