immeasurable, adj. limitless, boundless, illimitable, unlimited, unbounded, uncircumscribed, shoreless; incalculable, measureless, unfathomable, fathomless, undeterminable, undetermined, indeterminate; vast, extensive, immense, great, as far as the eye can see; innumerable, countless, untold, uncounted, numberless; endless, interminable, never-ending, inexhaustible, infinite.
immediate, adj. 1. instant, instantaneous, simultaneous, sudden, abrupt; prompt, swift, speedy, hasty, early, lightning-fast, like a flash.
2. present, now, current, on hand, running, up-to-the-minute; latest, actual, that be, existing, extant, existent.
3. nearest, next, closest, close, nigh; adjacent, adjoining, abutting, contiguous, neighboring; proximate, approximate, propinquitous.
4. direct, first-hand, experiential, personal, head-on, hands-on, face-to-face; on-the-job, in-the-field, on-the-scene, on-the-spot.
immediately, adv. 1. instantly, at once, right away, forthwith, without delay, instanter, Jocular, immediately if not sooner; this instant, this very moment or minute, now, SI. pronto; directly, Inf. right off the bat, straightway, straightaway, straight off, presently, Archaic, anon; promptly, speedily, summarily, quickly, Inf. lickety-split, posthaste, Inf. before you can say “Jack Robinson;” suddenly, abruptly, Music, subito, presto, on the spur of the moment, on a moment's notice; instantaneously, in the same breath, in the wink of an eye, in the twinkling of an eye, Inf. in a jiffy, in a tick; in a moment, at the drop of a hat, on the spot, at a blow, in double time, in double-quick time.
2. closely, nearby, nigh, in the vicinity, in the neighborhood, in the area; close to, fast by, at close range, at close quarters, in propinquity; next door, alongside, at one's door, under one's nose,
immemorial, adj. time-honored, ancestral, traditional, customary; ancient, age-old, dateless, Archaic. olden, archaic; long-standing, fixed, rooted, inveterate, habitual; established, enduring, lasting, living, permanent; unchangeable, immutable, unchanging,
immense, adj. 1. vast, extensive, broad, wide, expansive, Archaic, vasty, Archaic, immane; voluminous, bulky, capacious, massive; huge, enormous, large, big, prodigious; great, towering, staggering, great big, stupendous, tremendous, SI. humongous, SI. hulking; titanic, cyclopean, Atlantean, Brobdingnag-ian; colossal, mammoth, gigantic, monstrous, monumental, jumbo; elephantine, hippopotamic, leviathan, behemoth, dinosaurian, megatherian.
2. immeasurable, boundless, illimitable, unlimited, uncircumscribed, unbounded, limitless, shoreless; endless, interminable, infinite, inexhaustible, never-ending; incalculable, measureless, fathomless, unfathomable, undeterminable, indeterminate,
immensity, n. 1. vastness, immenseness, spaciousness, Archaic, vastitude, Archaic, immaneness; hugeness, enormity, enormousness, gigantism; greatness, bigness, largeness, monstrousness; fullness, bulkiness, massiveness, sizableness; voluminousness, capaciousness.
2. boundlessness, infinity, infinitude, infinite space, endlessness; abyss, abysm, maw, gulf, chasm; void, depths, stretches; immeasurability, illimitability, interminableness, never-endingness.
3. expanse, breadth, latitude, width; extent, measure, sweep, reach, compass; volume, magnitude, amplitude.