brow; head, nob[obs3], noddle[obs3], pate; capsheaf[obs3].
     high places, heights.
     topgallant mast, sky scraper; quarter deck, hurricane deck.
     architrave, frieze, cornice, coping stone, zoophorus[obs3], capital,
epistyle[obs3], sconce, pediment, entablature[obs3]; tympanum; ceiling &c. (covering) 223.
     attic, loft, garret, house top, upper story.
     [metaphorical use] summit conference, summit; peak of achievement,
peak of performance; peaks and troughs, peaks and valleys [in graphs]. 
     V. culminate, crown, top; overtop &c. (be superior to) 33. 
     Adj. highest &c. (high &c. 206); top; top most, upper most; tiptop;
culminating &c. v.; meridian, meridional[obs3]; capital, head, polar, supreme, supernal, topgallant. 
     Adv. atop, at the top of the tree. 
     Phr. en flute; fleur deau[Fr].

     #211.  Base. —­ N. base, basement; plinth, dado, wainscot; baseboard,
mopboard[obs3]; bedrock, hardpan [U.S.]; foundation &c. (support) 215; substructure, substratum, ground, earth, pavement, floor, paving, flag, carped, ground floor, deck; footing, ground work, basis; hold, bilge.
     bottom, nadir, foot, sole, toe, hoof, keel, root; centerboard. 
     Adj. bottom, undermost, nethermost; fundamental; founded on, based on,
grounded on, built on.

     #212.  Verticality. —­ N. verticality; erectness &c. adj.;
perpendicularity &c. 216a; right angle, normal; azimuth circle.
     wall, precipice, cliff.
     elevation, erection; square, plumb line, plummet. 
     V. be vertical &c. adj.; stand up, stand on end, stand erect, stand
upright; stick up, cock up.
     render vertical &c. adj.; set up, stick up, raise up, cock up; erect,
rear, raise on its legs. 
     Adj. vertical, upright, erect, perpendicular, plumb, normal, straight,
bolt, upright; rampant; standing up &c. v.; rectangular, orthogonal &c. 216a. 
     Adv. vertically &c. adj.; up, on end; up on end, right on end; a
plomb[Fr], endwise; one one’s legs; at right angles.

     #213.  Horizontality. —­ N. horizontality[obs3]; flatness; level,
plane; stratum &c. 204; dead level, dead flat; level plane.
     recumbency, lying down &c. v.; reclination[obs3], decumbence[obs3];
decumbency[obs3], discumbency|; proneness &c. adj.; accubation[obs3], supination[obs3], resupination[obs3], prostration; azimuth.
     plain, floor, platform, bowling green; cricket ground; croquet ground,
croquet lawn; billiard table; terrace, estrade[obs3], esplanade, parterre.
     [flat land area] table land, plateau, ledge; butte; mesa (plain) 344.
     [instrument to measure horizontality] level, spirit level. 
     V. be horizontal &c. adj.; lie, recline, couch; lie down, lie flat,
lie prostrate; sprawl, loll, sit down.
     render horizontal &c. adj.; lay down, lay out; level, flatten;
prostrate, knock down, floor, fell.