Density
Part of speech: noun
Definition: A measure of the amount of matter contained by a given volume. The ratio of one quantity to that of another quantity. The probability that an event will occur, as a function of some observed variable.
Example sentence: The sheer density of advertising creates a psychic mass, an overlay that can sometimes be very tense or aggressive. As a citizen, you have to participate in that every day. You have to walk by until it's changed.
Denseness
Part of speech: noun
Definition: The quality of being dense, especially in the sense of limited mental capacity.