The word "gleek" has a few synonyms that can be used interchangeably depending on the context and tone of a sentence. If you are looking for a synonym for the noun form of "gleek," you can use the word "trickster" or "prankster" to describe someone who enjoys playing practical jokes on others. Alternatively, if you are looking for a synonym that conveys a sense of joy and excitement, you could use "gleeful" or "mirthful." Finally, if you are looking for a synonym that captures the idea of a sudden or unexpected outburst of emotion or action, you could use "spasm" or "burst".