French door, archway, back door, barway, beginning, border line, bound, boundary, boundary condition, boundary line, bourn, break boundary, breakoff point, brink, bulkhead, carriage entrance, ceiling, cellar door, cellarway, circumscription, commencement, compass, confine, cutoff, cutoff point, dawn, deadline, delimitation, determinant, division line, door, doorjamb, doorpost, doorsill, doorstep, doorstone, doorway, edge, end, entrance, entrance hall, entranceway, entry, entryway, extremity, finish, floor, foyer, front door, frontier, galilee, gate, gatepost, gateway, groundsel, hatch, hatchway, hedge, high-water mark, interface, limen, limit, limitation, limiting factor, line, line of demarcation, lintel, lobby, low-water mark, lower limit, march, mark, mete, mudsill, narthex, outset, point, porch, portal, porte cochere, portico, postern, propylaeum, pylon, scuttle, side door, sill, start, starting line, starting point, stile, stoa, storm door, target date, term, terminal date, terminus, time allotment, tollgate, trap, trap door, turnpike, turnstile, upper limit, verge, vestibule, window sill
beginning, commencement, opening, outset, incipience, inception, inchoation, introduction, alpha, initial, inauguration, debut, le premier pas, embarcation, rising of the curtain, maiden speech, outbreak, onset, brunt, initiative, move, first move, narrow end of the wedge, thin end of the wedge, fresh start, new departure, origin, source, rise, bud, germ, egg, rudiment, genesis, primogenesis, birth, nativity, cradle, infancy, start, inception, creation, starting point, dawn, evolution, title-page, head, heading, van, caption, fatihah, entrance, entry, inlet, orifice, mouth, chops, lips, porch, portal, portico, propylon, door, gate, gateway, postern, wicket, threshold
, vestibule, propylaeum, skirts, border, first stage, first blush, first glance, first impression, first sight, rudiments, elements, outlines, grammar, alphabet, ABC, beginning, initial, initiatory, initiative, inceptive, introductory, incipient, proemial, inaugural, inchoate, inchoative, embryonic, rudimental, primogenial, primeval, primitive, primordial, aboriginal, natal, nascent, first, foremost, leading, maiden, begun, just begun, at the beginning, in the beginning first, in the first place, imprimis, first and foremost, in limine, in the bud, in embryo, in its infancy, from the beginning, from its birth, ab initio, ab ovo, ab incunabilis, ab origine, let's get going!, let's get this show on the road!, up and at 'em!, aller Anfang ist schwer, dimidium facti qui coepit habet, omnium rerum principia parva sunt.
edge, verge, brink, brow, brim, margin, border, confine, skirt, rim, flange, side, mouth, jaws, chops, chaps, fauces, lip, muzzle, threshold
, door, porch, portal, coast, shore, frame, fringe, flounce, frill, list, trimming, edging, skirting, hem, selvedge, welt, furbelow, valance, gimp, border, marginal, skirting, labial, labiated, marginated.