Learn English – What do you call a table that is unstable

Significant means meaningful; it says nothing about magnitude. A small advance may be significant:

Gene analysis based on work done by the publicly funded Human Genome Project may have moved science a small but significant step closer to finding a better treatment for Alzheimer's disease.

By the same token, a large advance may be insignificant:

This tonnage represent a very large advance in airborne volume, but is still insignificant relative to over-the-road volume.

So if you mean significant, write significant - don't replace it with big or large or huge. If however you are talking about magnitude, let usage guide you; consulting a corpus is a very good idea. (But at the BYU site you want COCA, Corpus of Contemporary American Usage, or BNC, British National Corpus, rather than COHA.) Large and big vary idiomatically; huge, however, signifies a much greater magnitude than either of those, amazingly large, and in formal usage will suggest you are speaking hyperbolically unless you can substantiate the choice.

Small, paper-wrapped gunpowder cylinders with a fuse sticking out whose sole purpose is to make noise are called firecrackers. There are larger diameter variants called M-80's, M-90's but the general term is firecracker. If the purpose is to go up in the air and explode or emit sparks then they are not firecrackers, but fireworks.