Bivouac.
ballistic
balsamic
barbaric
basic
beatific
biographic
biologic
bionic
biopic
bombastic
bulimic
bucolic
sadisticsarcasticsardonicsatanicscenicscientificshellacsimplisticseismographicskepticsociopathicsporadicsoporificspasticspecificstoicstaticsumacsystematicsyllabicsymbolicsymphonicsystemic
Alec
caloriccausticceramicclassiccoloniccryptic
A four letter word beginning with C and ending with X is crux.
havoc
stoic
Card or could?cadcalculatedcallusedcardboardcarloadcampgroundcandiedcarbonatedclapboardcanardcenteredcertifiedcentralizedcaramelizedcelluloidchildchordcivilizedcladcordcontendcollardcorneredconfoundconfinedconfusedcontrabandcornbreadcorrugatedconfinedcomprehendcombinedcommandcompoundcommendcrudcriedcreedcupboardcummerbundcustard
The word you are looking for is "cayman". Caymans are crocodilian reptiles that have a long, skinny snout.
Five letter words starting with C and ending with X are calyx and codex.
Charisma, chickpea, Casanova, Canberra
words beginning with b and ending with c: * basic * barbaric * bureaucratic * Baltic * biotic * bionic * ballistic * balletic * bulimic * biopic * bibliographic * bimetallic * biologic * beatific * bivouac * bubonic * botanic * basaltic