The first word that comes to mind is the word "transformer".
Tornado
The word "Tsunami" comes from the Japanese words "tsu" (harbor) and "nami" (wave), as tsunamis are typically generated by undersea earthquakes or volcanic eruptions that cause powerful ocean waves. The "T" in tsunami reflects its origin and pronunciation in the Japanese language.
tectonic is related with volcano so it tectonic can be part of the answer as well
One example of a group of 3 performers that starts with the letter "T" is "The Three Tenors," a famous opera singing group consisting of Luciano Pavarotti, Plácido Domingo, and José Carreras.
TopazTaaffeiteThomsoniteTanzaniteTiger-eyeTourmalineTsavoriteTugtupiteTurquoise
A seven letter word that starts with D and ends with T: decrypt
An eight letter word that starts with S and ends with T: satiristshortestsmallestsmarteststagnantstalwartstiffeststridentsubtract
TeamTremorTeenTrunkTankerTuneToneTrainTrickTeaseTenor
TroutThoughTeasedThirstTanker
TourTintTiltTimeTameTankToneTuneTentTrueTrim
toast
TinkerTeasedTremor
taunt
talenttyrantteapottickettrivettenant
televangelist?
temple
TRUST