| ISOBAR | Line connecting points on a weather chart (6) |
| ISOHEL | Meteorology line connecting points receiving equal amounts of sunshine (6) |
| ISOBRONT | Meaning "equal thunder", a line on a weather chart connecting points of simultaneous storm development (8) |
| ISALLOBAR | The contour line on a weather chart (9) |
| FLECHE | Meaning "arrow", a spirelet of a French Gothic cathedral; one of the 24 points on a backgammon board; or, a running attack in fencing (6) |
| ISOBARS | Lines of equal air pressure on a weather chart (7) |
| ROUTER | A device that allows packets of data to be moved efficiently between two points on a network (6) |
| ENLIST | Join up two points on a catalogue (6) |
| THORNS | Sharp points on a plant (6) |
| ISOTHERM | On a weather map, what is a line connecting points with the same temperature? (8) |
| HALLAM | _ _ _ _ _ _ Line - connecting Leeds and Sheffield via Castleford (6) |
| CORYMB | Flat-topped flower cluster whose stalks grow from different points on a stem but reach an equivalent height, as in hawthorn, candytuft etc. (6) |
| ORIENT | Align relative to points on a compass |
| CONTOUR | Word for outline; or, an isobath, isopleth or other line connecting points of equal value on a chart or map (7) |
| ISOTHERMS | Lines connecting points of the same temperature (on a weather map) |
| SNOODS | Lines connecting sea fishing hooks - and neckwarmers (6) |
| ISOGRAM | A word, such as "ambidextrously", with no repeating letters; or, a contour line connecting points registering the same value of some quantity (7) |
| ISOHYETS | Contour lines connecting points of equal rainfall on a map (8) |
| STANZA | Lines connecting the essence of Whistler, Heaney and Mozart |
| CHORD | A straight line connecting two points on a curve (5) |
