"Bigly" is an adverb that is rarely used in contemporary English but still has a particular ring to it in terms of its meaning. It describes something that is significant, impactful, or impressive. If you're looking for alternative words to "bigly," consider using "immense," "monumental," "grandiose," "momentous," or "substantial." Alternatively, "jaw-dropping," "breathtaking," "striking," "awe-inspiring," "colossal," and "towering" are also great options. If you want a more casual or contemporary tone, try using "epic," "awesome," "lit," or "monster." When used appropriately, any of these synonyms can help you convey a sense of grandeur, power, and impact effectively.