V. be prominent &c. adj.; project, bulge, protrude, pout, bouge|[Fr],
bunch; jut out, stand out, stick out, poke out; stick up, bristle up, start up, cock up, shoot up; swell over, hang over, bend over; beetle.
     render prominent &c. adj.; raise 307; emboss, chase.
     [become convex] belly out. 
     Adj. convex, prominent, protuberant, projecting &c. v.; bossed,
embossed, bossy, nodular, bunchy; clavate, clavated[obs3], claviform; hummocky[obs3], moutonne[obs3], mammiliform[obs3]; papulous[obs3], papilose[obs3]; hemispheric, bulbous; bowed, arched; bold; bellied; tuberous, tuberculous; tumous[obs3]; cornute[obs3], odontoid[obs3]; lentiform[obs3], lenticular; gibbous; club shaped, hubby [obs3][U.S.], hubbly [obs3][U.S.], knobby, papillose, saddle-shaped, selliform[obs3], subclavate[obs3], torose[obs3], ventricose[obs3], verrucose[obs3].
     salient, in relief, raised, repousse; bloated &c, (expanded) 194.

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     #251.  Flatness. —­ N. flatness &c. adj.; smoothness &c. 255.
     plane; level &c. 213; plate, platter, table, tablet, slab. 
     V. render flat, flatten; level &c. 213. 
     Adj. flat, plane, even, flush, scutiform[obs3], discoid; level &c.
(horizontal) 213; flat as a pancake, flat as a fluke, flat as a flounder, flat as a board, flat as my hand.

     #252.  Concavity. —­ N. concavity, depression, dip; hollow, hollowness;
indentation, intaglio, cavity, dent, dint, dimple, follicle, pit, sinus, alveolus[obs3], lacuna; excavation, strip mine; trough &c. (furrow) 259; honeycomb.
     cup, basin, crater, punch bowl; cell &c. (receptacle) 191; socket.
     valley, vale, dale, dell, dingle, combe[obs3], bottom, slade[obs3],
strath[obs3], glade, grove, glen, cave, cavern, cove; grot[obs3], grotto; alcove, cul-de-sac; gully &c. 198; arch &c. (curve) 245; bay &c. (of the sea) 343.
     excavator, sapper, miner.
     honeycomb (sponge) 252a. 
     V. be concave &c. adj.; retire, cave in.
     render concave &c. adj.; depress, hollow; scoop, scoop out; gouge,
gouge out, dig, delve, excavate, dent, dint, mine, sap, undermine, burrow, tunnel, stave in. 
     Adj. depressed &c. v.; alveolate[obs3], calathiform[obs3], cup-shaped,
dishing; favaginous[obs3], faveolate[obs3], favose[obs3]; scyphiform[obs3], scyphose[obs3]; concave, hollow, stove in; retiring; retreating; cavernous; porous &c. (with holes) 260; infundibul[obs3], infundibular[obs3], infundibuliform[obs3]; funnel shaped, bell shaped; campaniform[obs3], capsular; vaulted, arched.

     252a Sponge —­ N. sponge, honeycomb, network; frit[Chem], filter.
     sieve, net, screen (opening) 260. 
     Adj. cellular, spongy, spongious[obs3]; honeycombed, alveolar;
sintered; porous (opening) 260.