Quelching is a word that is not commonly used in everyday language. However, if you are looking for synonyms for this word, you might consider using words like squelching, splashing, slushing, and sloshing. These words depict a sound made when a liquid or something wet is being moved or stepped on. Other synonyms for quelching could include words like squishing, crushing, or compressing. These words could be used in different contexts depending on the situation, but they all convey the same sense of a damp and squishy sound. Regardless of the context, using these synonyms could help add more nuance to your writing or speech.