Mawson, C.O.S., ed. (1870–1938). Roget’s International Thesaurus. 1922.
Class II. Words Relating to SpaceSection II. Dimensions
2. Linear Dimensions
213. Horizontality.
NOUN:HORIZONTALITY; flatness; level, plane; stratum [See Layer]; dead level, dead flat; level plane.RECUMBENCY; lying down &c. v.; reclination, decumbence or decumbency, discumbency [obs.]; proneness &c. adj.; accubation, supination, resupination, prostration; azimuth.
[LEVEL SURFACES] plain, floor, platform, bowling green; cricket ground; croquet -ground, – lawn; billiard table; terrace, estrade [rare], esplanade, parterre, table-land, plateau, ledge.
VERB:BE HORIZONTAL &c. adj.; lie, recline, couch; lie -down, – flat, – prostrate; sprawl, loll; sit down.
RENDER HORIZONTAL &c. adj.; lay, lay down, lay out; level, flatten, even, raze, equalize, smooth, align or aline.
prostrate, knock down, floor, fell, ground, drop, grass [slang]; cut -, hew -, mow- down.
ADJECTIVE:HORIZONTAL, level, even, plane, flush; flat [See Flatness]; flat as a -billiard table, – bowling green; alluvial; calm, – as a mill pond; smooth, – as glass.
RECUMBENT, procumbent, accumbent, decumbent [bot.]; lying &c. v.; prone, supine, couchant, jacent [rare], prostrate, recubant [rare], resupinate.
ADVERB:HORIZONTALLY &c. adj.; on one’s back, on all fours, on its beam ends.