How do you say fountain in Japanese?
— 噴水 (ふんすい, funsui); 噴水

Related synonyms for fountain in Japanese
spring泉 (いずみ, izumi), 温泉 (おんせん, onsen) '(hot spring, spa)'
Specialized synonyms for fountain in Japanese
geyser間欠泉 (かんけつせん, kanketsusen)