| LEDGE | Horizontal structure such as a shelf, chimney piece, windowsill, underwater ridge, cornice, geological stratum, vein or lode (5) |
| WINGTIP | The part of an aircraft's horizontal structure most distant from the fuselage (7) |
| WINGS | Rigid horizontal structures on an aircraft (5) |
| WORK | Energy transfer measured in joules; a creation such as a book, musical composition or piece of embroidery, sewing etc; or, a structure such as a wall, built as part of a fortification (4) |
| SHELL | A structure such as a coconut's husk, a pea's pod, a pie's crust, a snail's exoskeleton or tortoise's carapace; or, a class that originally met in the apse of Westminster School (5) |
| MANTLE | Old name for a cloak, thus a word for a covering, such as a cloud, a chimney piece, Earth's asthenosphere, a mesh bag around a gas lamp's flame or a snail's pallium (6) |
| TOWER | Structure such as a turret or a campanile; coiffure worn as a fontange in the 17th and 18th centuries; or, a tarot trump card (5) |
| STAND | An act of rising to one's feet; or, a structure such as a pedestal, serving as a supporting foot (5) |
| OUTBUILDING | A structure such as a garage or barn, separate from a main house (11) |
| FRUIT | Nutrient-rich botanical structure such as a berry or a melon (5) |
| EARTHWORK | Structure such as a hill-fort or henge (9) |
| BEAM | Timber structure such as a joist, lintel, rafter or sleeper (4) |
| ROOF | Structure such as a thatch (4) |
| SEED | Botanical structure such as a peanut or almond |
| PARTICLE | Word for something as seemingly simple as a crumb or a speck of dust but also for a highly complex structure, such as an atom, proton, neutron or quark (8) |
| BRIDGE | Structure such as viaduct or series of stepping stones spanning a divide or gap; or, a transitional or connecting passage in a piece of music (6) |
| LIVELOAD | A variable weight on a structure, such as moving traffic on a bridge (4,4) |
| SURROUND | A chimney piece framing a fireplace; or, a border generally (8) |
| ENGINEER | Originally a builder of fortifications, siege artillery and mechanical weapons such as trebuchets, later a designer/maker of machinery or structures such as bridges or roads (8) |
| MESHWORK | An interlaced structure such as fret, netting, a lattice, tracery or a web (4-4) |
