Another easy word game

WAYside

IDEntified

ENTerprise

TERmite

ITEmised

MIStress

TREacherously

CHEerleaders

DERmatitis

MAThmatical

MATerialistic

LIStlessness

ISThmus

MUSical

CALifornia

ORNamental

AMEnded

DEDuctions

EDUcated

CATerpillars