Immediately rhymes with:
inappropriately, accurately, adequately, affectionately, alternately, approximately, commensurately, compassionately, definitely, deliberately, delicately, desperately, dispassionately, disproportionately, elaborately, explicitly, fortunately, gellatly, immaculately, implicitly, inaccurately, inadequately, inappropriately, indefinitely, indiscriminately, infinitely, inordinately, intimately, intricately, legitimately, minutely, moderately, passionately, privately, proportionately, quietly, separately, ultimately, unfortunately
Immediately sounds like:
imminently, immotile, indal, initial, initially, innately, intel