When it comes to finding synonyms for the phrase "blow something out", several alternatives come to mind. One such option is "extinguish", which refers to putting out a fire or a flame. Another possible synonym is "quench", which entails satisfying a thirst or desire. Additionally, one might consider using "nullify", which involves rendering something ineffective or cancelling it out. A similar alternative is "abolish", which means to formally and completely put an end to something. Lastly, "douse" can be used as a synonym, denoting the act of soaking or saturating with a liquid.