It is likely you are thinking of alliterative, which refers to the repetition of the same sound, usually a consonant, at the beginning of words in a phrase or sentence.
Here are some examples of alliteration:
* Peter picked a peck of pickled peppers.
* She sells sea shells by the sea shore.
* With words we weave a world of wonder.
If you meant something else, please provide more context or clarify your question.