ROGET THESAURUS
lose sight of
Blindness
VB
be blind, not see,
lose sight of, have the eyes bandaged, grope in the dark, not look, close the eyes, shut the eyes-, turn away the eyes, avert the eyes, look another way, wink, shut the eyes to, be blind to, wink at, blink at, render blind, blind, blindfold, hoodwink, dazzle, put one's eyes out, throw dust into one's eyes, pull the wool over one's eyes, jeter de la poudre aux yeux, screen from sight.
Invisibility
VB
be invisible, be hidden, lurk, escape notice, render invisible, conceal, put out of sight, not see,
lose sight of.
Disappearance
VB
disappear, vanish, dissolve, fade, melt away, pass, go, avaunt, evaporate, vaporize, be gone, leave no trace, leave 'not a rack behind', go off the stage, suffer an eclipse, undergo an eclipse, retire from sight, be lost to view, pass out of sight,
lose sight of, efface.
Neglect
VB
be negligent, take no care of &c (take care of), neglect, let slip, let go, lay aside, set aside, cst aside, put aside, keep out of sight, put out of sight,
lose sight of, overlook, disregard, pass over, pas by, let pass, blink, wink at, connive at, gloss over, take no note of, take no thought of, take no account of, take no notice of, pay no regard to, laisser aller, scamp, trifle, fribble, do by halves, cut, slight, play with, trifle with, slur, skim, skim the surface, effleurer, take a cursory view of, slur over, skip over, jump over, slip over, pretermit, miss, skip, jump, omit, give the go-by to, push aside, pigeonhole, shelve, sink, table, ignore, shut one's eyes to, refuse to hear, turn a deaf ear to, leave out of one's calculation, not attend to, not mind, not trouble oneself about, not trouble one's head about, not trouble oneself with, forget, be caught napping, leave a loose thread, let the grass grow under one's feet, render neglectful, put off one's guard, throw off one's guard, distract, divert.
Oblivion
VB
forget, be forgetful, fall into oblivion, sink into oblivion, have a short memory, have no head, forget one's own name, have on the tip of one's tongue, come in one ear and go out the other, slip memory, escape memory, fade from memory, die away from the memory, lose,
lose sight of, fail to recall, not be able to recall, unlearn, efface, discharge from the memory, consign to oblivion, consign to the tomb of the Capulets, think no more of, cast behind one's back, wean one's thoughts from, let bygones be bygones.