Yes.
It is a one syllable word.
The word "coy" has one syllable.
Yes the word skull is a one syllable word.
The word bruised only has one syllable. This means the whole word is the syllable and so there are no syllable breaks.
Crumb is a one syllable word.
one syllable
one syllable
one syllable
one syllable
Why Yes, "what" is a word with one syllable.
Yes, this is a one syllable word.
Yes, the word "the" has one syllable.
no word it isn't possible because if you take away one syllable from a five syllable word you get a four syllable word and there is no such thing as a "no syllable word"