Nāma-rūpa is best understood in the context of its interplay as ‘recognition of form’ (rūpa as both embodiment and objects of sense).
In Concept and Reality, Ñāṇananda mentions this: This ‘pathways of concepts and designations converged on it,…’ is the same dynamic we find in AN. 10.2.1.8/8.2.4.3 (Kiṃmūlaka Suttas’) where such ‘concepts and designations’ are the sabbe dhammā ‘all things’ which ‘converge at sensations’ (vedanā samosaraṇa), the basis of which are in nāma-rūpa and diversity are in the 18 dhātus of saḷāyatana (AN.9.1.2.4. – Samiddhi Sutta), and are led by the contemplative through the pathway of samādhi and sati to the utmost of wisdom and release into the deathless of nibbāna.