not insignificant
- substantialOf notable size or importance
- meaningfulHaving purpose or significance
- considerableNotably large in amount
- noteworthyMeriting special attention
- significantHaving notable importance
weighty · consequential · notable · material · appreciable · important · remarkable · serious · sizable · impactful · relevant · tangible · real · genuine · measurable · noticeable · visible · marked
magnitude/importance
not insignificantinsignificant
Lacking importance or consequence
trivial · negligible · inconsequential · unimportant · minor