- Flatness (Substantives), plane; see Horizontality 213, Layer 204, and Smoothness 255; plate, platter.
- Concavity (Substantives), depression, hollow, hollowness, indentation, intaglio, cavity, dent, dint, dimple, follicle, pit, sinus, alveolus, lacuna, honey-comb, excavation, trough 259.
- Sharpness (Substantives), keenness, pointedness, acuteness, acuity, acumination, spinosity, prickliness.
Cameo, high and low relief, bas-relief, basso rilievo, alto rilievo; repoussé work.
Mount, hill, etc. 206; cape, promontory, foreland, headland, point of land, hummock, spur, hog's back, ridge, offset.
(Verbs). To be prominent, etc., to project, bulge, belly, jut out, bristle up, to hang over, over-hang, beetle, bend over, protrude, stand out, stick out, poke out, stick up, start up, cock up, shoot up, swell.
To render prominent; to raise (see 307), to emboss, stud, bestud, ridge, crimp.
(Adjectives). Prominent, projecting, bulging, etc., bowed, bold, tuberous, tuberculous, bossed, bossy, knobby, nubbly, lumpy, etc., embossed, gibbous, salient, mamilliform, in relief, bowed, arched, bellied, baggy, cornute, odontoid, ridged, ridgy.
(Verbs). To render flat, flatten, smooth, level.
(Adjectives). Flat, plane, level, etc., flush, scutiform, scutellate.
(Phrases). Flat as a pancake; flat as a flounder; flat as a board; flat as my hand; a dead flat; a dead level.
Cup, basin, crater, chalice, etc. 191, bowl, socket, thimble.
Valley, vale, dale, dell, dingle, coombe, strath, corrie, glade, glen, cave, cell, cavern, cove, grotto, alcove, gully 198, culde-sac.
(Verbs). To be depressed, etc., to retire.
To depress, hollow, scoop, dig, delve, excavate, dent, dint, mine, undermine, burrow, tunnel.
(Adjectives). Depressed, concave, hollow, stove in, retiring, retreating, cavernous, honey-combed, alveolar, funnel-shaped, infundibular, bell-shaped, campaniliform.
A point, spike, spine, spicule, needle, aiguille, pin, prickle, prick, arrow, spear, bayonet, spur, rowel, barb, spit, cusp, horn, snag, tag, thorn, brier, bramble, thistle, nib, tooth, tusk, spoke, cog, ratchet, staple, bristle, beard, awn, crag, arête, chevaux de frise, crest, cone, peak, spire, pyramid, steeple, porcupine, hedgehog, vandyke.
Cutting edge, wedge, edge-tool, knife, jack-knife, pen-knife, razor, scalpel, axe, adze, etc., bill-hook, cleaver, etc.
Sharpener, knife-sharpener, strop, hone, grinder, grind-stone, whetstone, etc.
(Verbs). To be sharp, etc., to taper to a point, to bristle with.
To render sharp, etc., to sharpen, point, aculeate, whet, strop, hone, grind, barb, bristle up.
(Adjectives). Sharp, keen, pointed, conical, acute, acicular, aculeated, arrowy, needle-shaped, spiked, spiky, spicular, spiculate, ensiform, peaked, acuminated, salient, cusped, cornute, prickly, spiny, spinous, thorny, bristling, muricate, pectinated, studded, thistly, briery, cragged, craggy, snaggy, digitated, barbed, spurred, two-edged, tapering, fusiform, denticulated, toothed, cutting, trenchant, sharp-edged.
Starlike, stellated, stelliform.