it wouldn't and couldn't replace or replicate the creative process for the creator
The discussion seems to have shifted from AI to querying the value of a thesaurus, a rhyming dictionary. . . you might as well add in a regular dictionary, books of good poetry, all of those things are tools to help writers make choices as far as what word to use and how a word works in a place, how it sounds. Rhymes or not, depending on the verses being constructed.

Reference materials are only as helpful with the power the writer brings to them. I found various rhyming dictionaries, foreign language dictionaries, thesauruses, books of mythology, history, and more in my Dad's papers. I'm sure he had them there to assist with the songs he was writing. He wasn't your signer-songwriter who was a commercial success, he was a reference librarian who loved to write songs about local history and events. Something AI probably wouldn't be useful for.