Root: "cad"
* Cadence: (n.) The rhythmic flow of a sequence of sounds or words; a modulation of the voice. (Latin: *cadentia*, "falling, descent")
* Cadence: (n.) A regular beat or rhythm, especially in music or poetry.
* Decadence: (n.) A state of moral or cultural decline. (Latin: *decadere*, "to fall away, decline")
* Decadent: (adj.) Characterized by or given to decadence.
* Incandescent: (adj.) Emitting light as a result of being heated to a very high temperature; shining brightly. (Latin: *incandescere*, "to grow white-hot, become glowing")
Root: "cas"
* Case: (n.) A container, usually made of a hard material, for holding something. (Latin: *casa*, "hut, cottage")
* Case: (n.) A particular instance or example of something.
* Case: (n.) A legal matter or proceeding.
* Casually: (adv.) In a relaxed or informal manner.
* Casualty: (n.) A person killed or injured in a war or accident. (Latin: *casus*, "a happening, chance")
* Casuistry: (n.) The use of clever but unsound reasoning, especially in moral matters. (Latin: *casus*, "a case, a happening")
* Deciduous: (adj.) (Of trees and shrubs) shedding its leaves annually. (Latin: *decidere*, "to fall down, fall off")
* Occasion: (n.) A particular time or instance when something happens. (Latin: *occasio*, "chance, opportunity")
* Occasional: (adj.) Happening or done from time to time; not regular.
* Accusation: (n.) A charge or statement that someone has done something wrong or illegal. (Latin: *accusare*, "to accuse")
Note: Some of these words have different root origins but share similarities in spelling and meaning. The root "cas" is often related to "falling" or "happening," while "cad" often relates to "rhythm" or "decline."