2 words: water slide
It is one word: slideshow.
two
It is two words "tap water" for water from a faucet.
To ride over the water on a water-ski is hyphenated. However, both a single word and two words seem to be acceptable
it is water mammals
There are no one-word English anagrams, but there is the two-word "water cycle".
Oh, dude, like, totally! A waterslide is, like, a slide with water, so it's, like, two words smushed together to make one awesome compound word. So yeah, waterslide is totally a compound word. Cool, right?
There are two on a standard title slide. One is for the main title and one for the subtitle. You can also have a title only slide, which has just one placeholder.
Hydropower is one word when referring to energy derived from the gravitational force of falling or flowing water.
Surface Tension
The type of water-filled mattress is one word, waterbed.The fact that this is flagged by many spell-checkers does not mean that it is incorrect, only that the term has not yet been incorporated into the associated dictionaries. Other two-word terms are "water mattress" or "floatation mattress."
Every word has at least one syllable. Water has two syllables. Wa-ter.