Yes. You are right.

Yes, kakeru has many homonyms.

For example

毛布を掛ける（もうふをかける）　to cover something with a blanket

橋を架ける（はしをかける）　to build a bridge (over something)

お金を賭ける（おかねをかける）　to bed money

馬が駆ける （うまがかける） A horse runs.

歯が欠ける（はがかける）　A tooth breaks.

 

the verb "kakeru" means "to sprinckle." The synonym is "maku." kakeru (to call someone) is another verb.

Since in the offical lyrics there is no kanji for the word, do I assume when it is written in hiragana, that it means to sprinkle/pour? Not the other definitions?