| TOWERS | Structures such as campaniles (6) |
| BRIDGE | Structure such as an early "clam" or "clapper" type, built to span a divide or obstacle such as a river (6) |
| MUSCLE | In anatomy, contractile structure such as the psoas whose mobility is provided by myosins and its energy primarily by mitochondria (6) |
| FABRIC | Word for a textile or its texture; or, structure, such as that of society (6) |
| STYLET | Hard anatomical structure, such as the mouthpart of an aphid (6) |
| SOFFIT | Underside of an architectural structure such as an arch, balcony, or cornice (6) |
| OILRIG | Offshore structure such as Piper Alpha, which was destroyed by fire in 1988 (3,3) |
| 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) |
| 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) |
| NESTS | Structures such as pheasants' nides (5) |
| STROBILI | Seed-bearing structures such as pine cones (8) |
| 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) |
| BRIDGES | Structures such as San Francisco's Golden Gate and London's Tower |
| CRYSTALS | Solid mineral structures such as quartz, amethyst or diamonds (8) |
| STEEPLEJACK | Into one who climbs tall structures, such as chimneys, to carry out repairs (11) |
| CHIASMA | Crossing over of two parts or structures such as the fibres of the optic nerves in the brain |
| HILUM | Depression or fissure where structures such as blood vessels and nerves enter an organ |
| DEHISCENT | Of plant structures such as pods, splitting open at maturity to release the contents (9) |
| STAND | An act of rising to one's feet; or, a structure such as a pedestal, serving as a supporting foot (5) |
| EARTHWORK | Structure such as a hill-fort or henge (9) |
