If I write a poem in strict iambic pentameter, each line will have five feet, and each will start with an unstressed syllable, followed by a stressed. But what meter / form is the poem in if I pay no attention to feet, but use a regular syllable count? What I mean is, I use 10 syllables per line, but line 1 might start with an iamb, followed by a trochee and ends on an anapest. But then line two starts with a trochee, followed by dactyl, random foot, random foot, random foot.
Thanks for the correction, @OJB, but an answer to the question might have made for a more productive post.
Syllabic IS the answer to your question. You asked what it is called, and it is called SYLLABIC POETRY.