Scrunch up can be defined as crumpling or squeezing something or someone tightly. There are various synonyms for this word which express similar meaning such as crumple, crunch, compress, squash, twist, contort, crease, wrinkle, fold, knot, pucker, ruffle, and contract. These synonyms are often used interchangeably with scrunch up and can be employed depending on the context and tone of the statement. For instance, one might say "She scrunched up her face in anger," which could also be rephrased to "She contorted her face in anger." Therefore, using synonyms such as these can add depth and precision to one's expression.