bed board artifact level Mobius strip side mitre vertical surface artefact screen tread spandrel superficies ground skin plaster gameboard spandril plasterwork horizontal surface Klein bottle face projection screen silver screen miter work surface meniscus

interior substrate interface firmament palate outside vault of heaven side wavefront hard palate celestial sphere bounds welkin empyrean photosphere boundary sphere roof of the mouth exterior bound heavens end face wave front inside substratum

body of water Earth's surface geosphere gap layer water lithosphere floor opening

facet aspect

bed ground anchorage fireside haunt free zone refuge tank farm quadrant shrubbery hunting ground danger arena bed-ground hangout middle corner scene repair bedground heart disaster area free port playground vacation spot no man's land region country space winner's circle resort area high country section city block broadcast area clear block hearth rain shadow eye center staging area anchorage ground retreat resort stamping ground no-go area open neighborhood centre safety

issue grey area subject territory topic matter gray area

cortical area half-moon ring of color yellow spot thenar macula midriff quick side waistline body part loins inguen pressure point area of cardiac dullness middle lunule macular area fovea pubes erogenous zone midsection groin lunula region areola parafovea perineum hypochondrium pubic region macula lutea sole cortical region waist palm epigastrium cleavage fovea centralis

nave enclosure family circle box patio terrace rest area upper balcony dead-air space pit aisle bullpen corner second balcony layby auditorium orchestra pit press gallery rest stop storage space turnaround panopticon breakfast area courtyard baggage claim sanctuary hideaway room pull-off breakfast nook goalmouth retreat choir chancel bema court dining area quad quadrangle threshing floor nook construction structure peanut gallery lay-by

province land arena sphere orbit field distaff responsibility domain realm preserve front political sphere political arena kingdom environment lap

balk baulk acreage erasure space blank space place land area footprint section surface area extent plane section expanse