kumquat, of course
· kiwi · mango · quince · tomato
Mango
kumquat
B, D, E, F, H, I, K, L, M, N, P, R, T, (As capitals) b, d, h, i, k, l, m, n, p, q, r, (as small letters)
Seven letter words from these letters are:CampingCappingCarpingEpigramGrimaceMappingMarkingPackingParkingPeakingPeckingPermianRackingRappingReamingReaping
jitterykindheartedmagnificentnaughtyoptimisticquestionableunderstandingwisexenophobiczesty
Quacked
K
False After K: its L(1), M(2), N(3), O(4), P(5), Q(6) Then its R.
Quark
In upper case: A, B, G, K, M, N, Q, R, V, W, X, Y and Z.
The letters "f n b o g m a i q q x x" can be rearranged to spell "boxing."