Vine is monosyllabic.
Yes, but the stress in the word "Frankenstein" is on the first syllable, and the word "vine" has only one syllable, so it might sound a bit awkward in a poem.
There is one syllable for the word what.
The word "have" has just one syllable.
The word "tell" has one syllable.
one syllable
one syllable
one syllable
one syllable
The word plant has one syllable. This means that there is no syllable divide for this word.
The word "to" has one syllable.
In the word "the", there is one syllable.
Crown has one syllable.