adj. 25B6; adjective
a monumental task : HUGE, great, enormous, gigantic, massive, colossal, mammoth, immense, tremendous, mighty, stupendous.
a monumental error of judgement : TERRIBLE, dreadful, awful, colossal, staggering, huge, enormous, unforgivable, egregious.
Beethoven's monumental works : IMPRESSIVE, striking, outstanding, remarkable, magnificent, majestic, stupendous, ambitious, large-scale, grand, awe-inspiring, important, significant, distinguished, memorable, immortal.
a monumental inscription : COMMEMORATIVE, memorial, celebratory, commemorating.