Try a dictionary? My examples:
Beginning with c:
Cat, Christmas, coke, church, cake, chord, camel, carnival, cop, candy, carivan, crazy, can, cap, clip, cookie cutter :-) - that's a double - , cup, crab, club, cave, caramel, community, criptic, cell, crane, ect. ect. ect.
Ending with c:
Considering it is improper spelling to end a word with c, the only word I can think of that ends with c would be mic, which is actually not even an actual word, so I can't really help you there! Try googling, "Words that end with c"
volcanic
cenabit
cent
eccentric
cafeteriacameracabanacinemaChinacontracolacomacorneacommacriteriacredenzacocoa
Some words that start with the letter c and end with the letter k include:caulkchickchink (a piece)clackclickclockcluckcock (rooster)cookcrackcrankcrankshaftcreekcreakcrickcroakcrockcrook
banic
Some words that start with J and end with C: jaditic. jalapic. jargonistic. jesuitic. jingoistic. journalistic. judgmatic. juridic. juristic.
curfew
words that start with C and end with E:carecalibratecapecasecategorizecamecanecachecarousecaptivecapitalizecausecarvecarnagecelebratecheesechosechocolatechasechastechimeclonecutecurecyclecluecorrodecorsagecostumechoosechivecirculatecirclecoreconecomputecomparecomplicatecomposeconclusivecomprehensiblecomradeconcreteconcludeconfusecongregateconsequenceconsoleconstitutecompetecompleteconcentratecoursecongratulatecontinueconfinecontritecomecloseclotheclovecreatecratecravecradlecripplecubeComemorate
camel caramel cornell
creed, chard, child
concerned, conceited, condensed