know how to use vibrato but cannot you it in words that weel except for syllables?

Hi, how can I sing vibrato with words, I can do vibrato with sylabbles but not with words.

It can help to think of words as just different combinations of those syllables. Try adding vibrato on sustained notes (usually at the end of the phrase) - that's usually where we use it anyways! And it helps to have some time to let your vibrato "go".