Got it in 4 with SYRUP, SHARE, SONAR, and while watching other RU-vid shows was trying to consider what other options were left.... and mid video it struck. to savor the moment.
Here is a ranking list of all 26 letters (compiled from the 1,103 answers we have seen thus far). The numeric values are the number of words that contain each letter. Tier 1: E = 522, A = 453, R = 419, T = 350, O = 341 Tier 2: I = 309, L = 308, S = 270, N = 262, C = 219 Tier 3: U = 204, H = 194, Y = 171, D = 169, P = 163 Tier 4: G = 150, M = 139, B = 124 Tier 5: K = 97, F = 90, W = 84, V = 67 Tier 6: X = 21, Z = 18, Q = 15, J = 12