Which term describes something that is gigantic?

The term that describes something that is gigantic is "huge." This word conveys a significant size or an extraordinary scale, which aligns perfectly with the concept of being gigantic. In various contexts, "huge" can imply something that far exceeds the average or typical size, indicating that it is imposing or remarkably large.

Terms like "tiny," "moderate," and "minuscule" suggest smallness or limited size, which stands in direct contrast to the idea of being gigantic. This distinction highlights why "huge" is the appropriate choice in indicating something of a grand or vast scale.