The phrase "fig up" is not a commonly used term in English language. However, there are many synonyms for this term that can be used to convey similar meanings. Some of the synonyms for "fig up" include "doll up," "dress up," "deck out," "spruce up," "fix up," "gussy up," and "beautify." These terms all refer to the act of adorning oneself or an object in a pleasing manner. They can also be used to describe the process of making something visually more appealing. Overall, these synonyms provide a range of options to use instead of "fig up" in a sentence.