Common Words:
* casa: house
* coche: car
* comer: to eat
* correr: to run
* cuál: which (masculine singular)
* cuánto: how much (masculine singular)
* cuándo: when
* cómo: how
Other Words:
* caballo: horse
* cadena: chain
* café: coffee
* caliente: hot
* cama: bed
* camino: road
* canción: song
* cara: face
* carne: meat
* carta: letter
* castillo: castle
* causa: cause
* césped: grass
* cielo: sky
* cine: cinema
* ciudad: city
* clase: class
* cocinar: to cook
* colegio: school
* color: color
* columna: column
* conmigo: with me
* contigo: with you
* cosa: thing
* creer: to believe
* cuchara: spoon
* cuerpo: body
* cuidado: care
Note: This is not an exhaustive list, and there are many more Spanish words that start with "c."
To find more words, you can use a Spanish dictionary or online resources like WordReference.