- 沸騰【ふっとう】 - boiling, seething, becoming heated (e.g. of a debate), excitement, agitation, fermentation, soaring (of prices), shooting up 
- 沸かす【わかす】 - to boil, to heat, to excite, to melt (metal) 
- 湯沸かし器【ゆわかしき】 - water-heater, water-boiler 
- 沸き起こる【わきおこる】 - to well up, to burst, to arise 
- 沸き返る【わきかえる】 - to boil up, to seethe, to get excited, to be in an uproar