As verbs the difference between classified and declassified

is that classified is past tense of classify while declassified is past tense of declassify.

As an adjective classified

is formally assigned by a government to one of several levels of sensitivity, usually (in English) top secret, secret, confidential, and, in some countries, restricted; thereby making disclosure to unauthorized persons illegal.

As a noun classified

is a classified advertisement in a newspaper or magazine.

As a proper noun cad

is chad (country in central africa).

As a noun finesse is

finesse.

As nouns the difference between cadre and grade

is that cadre is a frame or framework while grade is a rating.

As a verb grade is

to assign scores to the components of an academic test.

As nouns the difference between tightness and shortening

is that tightness is the quality or degree of being tight while shortening is solid fat, such as butter, lard or hydrogenated vegetable oil, used to make shortcrust pastry.

As a verb shortening is

.

As nouns the difference between cysts and nodules

is that cysts is while nodules is .

As nouns the difference between robin and cardinal

is that robin is various passerine birds (about 100 species) of the families Muscicapidae, Turdidae and Petroicidae (formerly family: Eopsaltridae), typically with a red breast while cardinal is a number indicating quantity, or the size of a set, e.g., one, two, three. See Wikipedia article on Cardinal number.

As a proper noun Robin

is a given name derived from Germanic.

As an adjective cardinal is

of fundamental importance; crucial, pivotal.

As nouns the difference between secrecy and cryptography

is that secrecy is concealment; the condition of being secret or hidden while cryptography is the discipline concerned with communication security (eg, confidentiality of messages, integrity of messages, sender authentication, non-repudiation of messages, and many other related issues), regardless of the used medium such as pencil and paper or computers.

As nouns the difference between sirens and nymphs

is that sirens is plural of lang=en while nymphs is plural of lang=en.

As nouns the difference between stealing and embezzlement

is that stealing is (uncountable) the action of the verb to steal while embezzlement is (legal|business) the fraudulent conversion of property from a property owner.

As a verb stealing

is .

As nouns the difference between ayat and hadith

is that ayat is a verse of the Quran while hadith is {{context|countable|religion|Islam}} An eyewitness account of a saying or action of Muhammad (or sometimes one of his companions) not otherwise found in the Quran.

As a proper noun Hadith is

{{context|uncountable|religion|Islam}} The entire collection of hadiths (sayings and deeds) of Muhammad with a particular branch of Islam or Islamic jurisprudence.