to satisfy oneself (by doing); to find relief (in doing)
to feel relieved; to feel satisfied
acid reflux; bile reflux; pyrosis; gloating; gratification; satisfaction
fractional distillation; fractionation
accumulation (e.g. of water); retention; storage; collection; sequestration (e.g. of carbon dioxide)
refinement (e.g. of alcohol); rectification
fraction (e.g. in distillation); cut
drain and pool for collecting sewage, etc.