two
two words
It is used as one word.
no it is not an one word it is of two word
Hipbone is one word.
I think the word "ongoing" is only one word, but it has two syllables that are two separate words.
"Power" is properly pronounced as two syllables 'pow-(e)r, but because the "e" is considerably shortened in speech, it can sound very much like one syllable. Very good question.
The word "hairbrush" is typically written as one word, not two.
One word, two syllables
It is one word.
one word
One sixth to the power of two yields 0.02777777777
It is one word.