- bulbous16
- bullous14
- bumptious20
- bunrakus18
- bureaus12
- burglarious19
- burnous13
- bus7
- butyrous15
- byssus12
- cachous16
- cacophonous24
- cactus13
- cadaverous19
- caduceus17
- caducous17
- caestus11
- calamitous18
- calamus15
- calathus15
- calcaneus18
- calcareous18
- calcicolous23
- calciferous22
- calcifugous25
- calculous19
- calculus18
- caliginous18
- callipygous24
- callous13
- callus12
- calumnious20
- calyculus21
- camphoraceous28
- campus16
- campylotropous30
- canaliculus22
- cancellous20
- cancerous17
- cankerous18
- canorous13
- cantankerous22
- canthus14
- cantus11
- capacious19
- capricious20
- captious15
- carbonaceous23
- carboniferous24
- carcajous25
- carcinomatous24
- caribous15
- carious11
- carnivorous20
- carolus12
- carpus13
- cartilaginous21
- caseous11
- casus9
- catadromous19
- cataractous18
- catechus17
- caucus14
- cautious13
- cavernicolous26
- cavernous18
- ceanothus16
- cementitious20
- censorious15
- census11
- cercus13
- ceremonious19
- cereus10
- cernuous14
- cerous10
- ceruminous19
- cestus10
- cetaceous16
- champertous23
- chancrous19
- chapeaus17
- chateaus14
- chiasmus17
- chiaus12
- chitinous16
- chivalrous21
- chlorophyllous30
- chlorous15
- choragus16
- choregus16
- chorus12
- chromous17
- chylous16
- chymous18
- cinereous14
- circuitous18
- circumfluous28
- circus13
- cirrocumulus25
- cirrostratus16
- cirrous11
- cirrus10
- cistus10
- citreous12
- citrous11
- citrus10
- clamorous17
- clangorous18
- clavus15
- cleistogamous23
- clonus12
- clypeus17
- cobaltous17
- coccous17
- coccus16
- coenurus14
- coetaneous15
- coitus10
- coleopterous20
- coleus11
- collagenous20
- collembolous25
- collenchymatous32
- colobus15
- colonus13
- colossus13
- commodious21
- comous13
- compendious23
- complicitous26
- compunctious27
- conatus12
- conceptus20
- condylomatous25
- congenerous19
- congius14
- congous14
- congruous17
- coniferous18
- consanguineous24
- conscientious22
- conscious17
- consensus15
- consentaneous20
- conspectus21
- conspicuous23
- contagious17
- contemporaneous27
- contemptuous24
- contentious17
- conterminous21
- contiguous18
- continuous17
- contradictious23
- contrarious16
- contumacious24
- contumelious22
- conus10
- convolvulus27
- copious14
- coprophagous26
- coprophilous25
- coriaceous17
- cormous14
- corneous13
- cornus11
- corpus13
- coryphaeus21
- coteaus11
- coterminous19
- cothurnus17
- coumarous17
- courageous17
- courteous14
- couscous16
- covetous16
- coypous16
- coypus15
- crankous17
- crapulous18
- credulous16
- cretinous14
- cribrous15
- criminous17
- crocus13
- croupous16
- cruciferous22
- crus8
- crustaceous19
- cryptococcus30
- cryptogamous26
- cultus12
- cumbrous19
- cumulonimbus29
- cumulous18
- cumulus17
- cunnilinctus24
- cunnilingus22
- cupreous16
- cupriferous22