The phonological hierarchy (from smaller to larger units) is as follows:

1. Feature
2. Segment (phoneme)
3. Mora (μ) ("half-syllable")
4. Syllable (σ)
5. Foot (F)
6. P-word (ω) (prosodic or phonological word)
7. Clitic group
8. Phonological phrase (P-phrase)
9. Intonational phrase (I-phrase)
10. Utterance

From 3. Mora downwards this is also the prosodic hierarchy.