Loneliness rhymes with:
slovenliness, deadliness, ghastliness, holiness, liveliness, niggardliness, orderliness, silliness, slovenliness, timeliness, ugliness, worldliness
slovenliness, deadliness, ghastliness, holiness, liveliness, niggardliness, orderliness, silliness, slovenliness, timeliness, ugliness, worldliness