わずか => only, merely, (a) little, small quantity N3
More or less in quantity
や => N1 and N2 (shows a non-exhaustive list of items), N1 or N2 (small amount) N5
Particles
ないことはない => There is a (small) possibility of A. A is not impossible. N3
Potential, Possibility
なりとも => At least (a little bit) of A (usually a small amount), One of A (used for showing one example out of a set/group) N1
Miscellaneous