bubbling hot

• boilingLiquid vaporization temperature
• steamingReleasing hot vapor
• simmeringCooking below boiling point
• scaldingExtremely hot, burning
• percolatingSlowly seeping through

fizzing · effervescent · cauldron · kettle · geyser · volcanic · lava · thermal · gurgling · roiling · seething · frothing · churning · hissing · molten · springs · jacuzzi · stew