When it comes to synonyms for the phrase "douse in," there are a few different options to choose from depending on the context. For example, if you're talking about putting out a fire or extinguishing a flame, some potential synonyms might include "smother," "quench," or "extinguish." However, if you're using "douse in" to describe soaking or saturating something, other possible synonyms could include "saturate," "soak," or "drench." Overall, the best synonym for "douse in" will depend on the specific situation and what you're trying to convey.