Friday puzzle -- unusual plurals
Alex Y
A and B are two common English words.
B is the plural of A, and A and B have no letters in common.
I know of at least six solutions, although in one pair, the plural stretches the "common English word" description a bit, since it is an archaic form I certainly had never heard of. But the other five pairs are everyday English (and not uniquely British or American English).
BTW, we are talking about true plurals, not collective terms. E.g., "sheep" and "flock" is not a solution.