indentation, intaglio, cavity, dent, dint, dimple, follicle, pit,
sinus, alveolus†, 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†, bottom, slade†, strath†,
glade, grove, glen, cave, cavern, cove; grot†, grotto; alcove, cul-de-
sac; gully &c 198; arch &c (curve) 245; bay &c (of the sea) 343.
excavator, sapper, miner.
honeycomb (sponge) 252.1.
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†, calathiform†, cup-shaped, dishing;
favaginous†, faveolate†, favose†; scyphiform†, scyphose†; concave,
hollow, stove in; retiring; retreating; cavernous; porous &c (with
holes) 260; infundibul†, infundibular†, infundibuliform†; funnel shaped,
bell shaped; campaniform†, capsular; vaulted, arched.
252a Sponge — N. sponge, honeycomb, network; frit [Chem], filter.
sieve, net, screen (opening) 260.
Adj. cellular, spongy, spongious†; honeycombed, alveolar; sintered;
porous (opening) 260.