爆炸 

Pinyin: bào zhà 
Meaning：Explosion
Sentence:  马听到爆炸声受了惊。The horse took a fright at the sound of the explosion.

More: 

爆： 

Pinyin: bào 
Meaning: to crack; to explode or burst
Radical: 火
Stokes: 19
Traditional: 爆
Common words/Phrase:
爆炸 [bào zhà] 【to explode; to blow up 】
爆发 [bào fā] 【to break out; to erupt】
爆笑 [bào xiào] 【hilarious】
爆竹 [bào zhú] 【firecracker】
爆胎 [bào tāi] 【tire burst】

炸： 

Pinyin: zhá,zhà
Meaning: fry; explode
Radical: 火
Stokes: 9
Traditional: 炸
Common words/Phrase:
炸弹 [zhà dàn] 【bomb】
炸药 [zhà yào] 【explosive】
炸毁 [zhà huǐ] 【dynamite】