Middlesbrough F.C. with supporters' clubs across the globe. The largest supporters' clubs include the Official Supporters' Club, the Middlesbrough Disabled Supporters' Association, Yarm Reds, Red Faction and Middlesbrough Supporters South. Middlesbrough supporters' main rivals are Sunderland (with whom they contest the Tees–Wear derby), Newcastle United (with whom they contest the Tyne–Tees derby), and Leeds United, a fact confirmed by planetfootball.com's 2004 survey. Carlisle United see Middlesbrough as their biggest rivals, but Middlesbrough supporters have not reciprocated, as they do not see Carlisle as a top three rival. The nickname "Smoggies" was first used as a derogatory term by opposing supporters; it relates
Middlesbrough it shares characteristics of both. Furthermore, the accent reflects the town's history. This accent is also known as a Smoggie accent or a Teesside accent. "Nurse/Square" A recognisable feature of Middlesbrough English is the fronted form of NURSE, reflecting its similarity with Liverpool English, having the characteristic NURSE/SQUARE merger at [ɛ:]. Additionally, the form is found to be the preferred variant of female speakers. This can be heard in words like work, purple, dirt and shirt which are pronounced more like "werk/wairk", "perple/pairple", "dert/dairt" and "shert/shairt". Another feature of the Middlesbrough accent is the presence of a harsh "CK" sound.