As verbs the difference between categorize and classifying

is that categorize is to assign a category; to divide into classes while classifying is present participle of lang=en.

As an adjective classifying is

that serves to classify.

As nouns the difference between workstream and workgroup

is that workstream is the organised output of several distinct, and often unrelated work groups while workgroup is a group of workers engaged in a series of collaborative tasks who usually work together.

As nouns the difference between meltingpoint and reactivity

is that meltingpoint is (rare) while reactivity is responsiveness to stimulation.

As adjectives the difference between awry and rare

is that awry is turned or twisted toward one side; crooked, distorted, out of place while rare is cooked very lightly, so the meat is still red (in the case of steak or beef in the general sense).

As an adverb awry

is obliquely, crookedly; askew.

As a verb rare is

to rear, rise up, start backwards.

As nouns the difference between strength and density

is that strength is the quality or degree of being strong 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 a verb strength

is to give strength to; to strengthen.

As nouns the difference between brittle and hardness

is that brittle is (uncountable) a confection of caramelized sugar and nuts while hardness is the quality of being hard.

As an adjective brittle

is inflexible, liable to break or snap easily under stress or pressure.

As verbs the difference between account and accounted

is that account is to provide explanation while accounted is (account).

As a noun account

is (accounting) a registry of pecuniary transactions; a written or printed statement of business dealings or debts and credits, and also of other things subjected to a reckoning or review.

As nouns the difference between flexible and toughness

is that flexible is something that is flexible while toughness is the state of being tough.

As an adjective flexible

is capable of being flexed or bent without breaking; able to be turned, bowed, or twisted, without breaking; pliable; not stiff or brittle.

As verbs the difference between hiking and walk

is that hiking is present participle of lang=en while walk is to move on the feet by alternately setting each foot (or pair or group of feet, in the case of animals with four or more feet) forward, with at least one foot on the ground at all times. Compare run.

As nouns the difference between hiking and walk

is that hiking is walking in the countryside for pleasure or sport while walk is a trip made by walking.

As a proper noun good

is .

As a letter d is

the fourth letter of the.

As a numeral d is

cardinal number five hundred (500).

As a symbol d is

deuterium, when it needs to be distinguished from ordinary hydrogen.