There are several synonyms for the word "gooky" such as slimy, gooey, sticky, viscous, and syrupy. These words describe a substance that is thick and viscous in texture, usually difficult to remove or clean. "Gooky" can also mean something that is messy or dirty, in which case synonyms like grimy, grubby, soiled, and filthy can be used. Another possible synonym for "gooky" could be "mucky", which refers to something that is wet and dirty. Overall, there are many different words that can be used as synonyms for "gooky", each with its own subtle differences in meaning and usage.