Another easy word game

WORrisome

SOMnambulism

AMBassadors

SADdest

ESTimable

STImulated

MULtiplication

ULTimate

MATerialistic

STIckleback

hACKer

BACktracking

RACketeer

ETErnally

TERmite

MITigating

TIGhtest

ESTranged

TRAnsformed

FORmidable