density

As nouns the difference between density and congestion

is that density is (physics: amount of matter contained by a given volume) A measure of the amount of matter contained by a given volume while congestion is the act of gathering into a heap or mass; accumulation.

As an adjective tight

is firmly held together; compact; not loose or open.

As an adverb tight

is firmly, so as not to come loose easily.

As a verb tight

is (obsolete) to tighten.

As a noun density is

(physics) a measure of the amount of matter contained by a given volume.

As nouns the difference between opacity and density

is that opacity is the state or quality of being opaque, not allowing light to pass through while density is (physics: amount of matter contained by a given volume) A measure of the amount of matter contained by a given volume.

As nouns the difference between density and densities

is that density is (physics) a measure of the amount of matter contained by a given volume while densities is .

As a noun density

is (physics) a measure of the amount of matter contained by a given volume.

As a verb tense is

.

As an adjective sustainable

is able to be sustained.

As a noun density is

(physics: amount of matter contained by a given volume) A measure of the amount of matter contained by a given volume.

As nouns the difference between composition and density

is that composition is the proportion of different parts to make a whole while density is (physics: amount of matter contained by a given volume) A measure of the amount of matter contained by a given volume.

As nouns the difference between heavy and density

is that heavy is a villain or bad guy; the one responsible for evil or aggressive acts while density is (physics) a measure of the amount of matter contained by a given volume.

As an adjective heavy

is (of a physical object) having great weight or heavy can be having the heaves.

As an adverb heavy

is heavily.

As a verb heavy

is to make heavier.

Density is a related term of validity.

As nouns the difference between density and validity

is that density is (physics) a measure of the amount of matter contained by a given volume while validity is the state of being valid, authentic or genuine.

As nouns the difference between density and soundness

is that density is (physics: amount of matter contained by a given volume) A measure of the amount of matter contained by a given volume while soundness is the state or quality of being sound.