| indelible(great, extraordinary, outstanding, notable, unforgettable) |
| influential(significant, vital, imperative) |
| interesting(great, extraordinary, outstanding, notable, unforgettable) |
| isolated(adjective, rare) |
| large(big, significant, substantial, valuable, vital) |
| lasting(great, extraordinary, outstanding, notable, unforgettable) |
| limited(adjective, rare) |
| main(adjective, bad, great, excellent, superior) |
| major(adjective, bad, great, excellent, superior) |
| major-league(great, extraordinary, outstanding, notable, unforgettable) |
| marked(adjective, great, big, wonderful, exceptional) |
| matchless |
| material(big, significant, substantial, valuable, vital) |
| mattering much(expression, big, significant, substantial, valuable) |
| meaningful(big, outstanding, significant, substantial, valuable) |
| meritorious(adjective, bad, great, excellent, superior) |
| monumental(great, extraordinary, outstanding, notable, unforgettable) |
| mostest(adjective, bad, great, excellent, superior) |
| necessary(big, significant, substantial, valuable, vital) |
| notable(adjective, great, extraordinary, important, wonderful) |