activate, actuate, aerodrome, airdrome, airfield, airport, animate, area, arena, arouse, assumption, awaken, backbone, backcloth, backdrop, background, bait, base, basic, basin, basis, bedrock, boost, borough, countryside, decoy, dirt, discipline, distance, domain, earth, earthiness, endow, energize, essence, essentials, establishment, exalt, excite, fall, field, floor, footing, found, foundation, framework, fundamental, glebe, ground, grounding, groundwork, impel, impetus, impulse, incentive, incite, inducement, inspire, keystone, land, lay, length, locality, lure, mainstay, moment, motif, motivate, motive, mould, oestrum, painkiller,
pedestal, place, postulate, premise, presumption, presupposition, prod, prospect, province, put, putt, radix, realm, region, remoteness, riprap, root, rouse, selling, setting, site, soil, space, spur, stake, stimulant, stimulate, stimulation, stimulus, substrate, substratum, substructure, terrene, theme, trail, treat, underpinnings, understanding, world