In phonology, affricates tend to behave similarly to stops, taking part in phonological patterns that fricatives do not. Kehrein analyzes phonetic affricates as phonological stops. A sibilant or lateral (and presumably trilled) stop can be realized phonetically only as an affricate and so might be analyzed phonemically as a sibilant or lateral stop. In that analysis, affricates other than sibilants and laterals are a phonetic mechanism for distinguishing stops at similar places of articulation (like more than one labial, coronal, or dorsal place). For example, Chipewyan has laminal dental vs. apical alveolar ; other languages may contrast velar with palatal and uvular .