- Thrai (Romulan)
- Thrai (disambiguation)
- Thrai class
- Thrakkite
- Thralen
- Thrall
- Thrandasar v'Elex
- Thrann
- Thranstor
- Thranstor IV
- Thrantira zh'Zulis
- Thraq
- Thrasslith
- Thrax
- Thrax (disambiguation)
- Thrax Sa'kat
- Thraxis
- Thraz
- Thraz Outpost
- Thraz Streamer
- Thraz system
- Three
- Three-dimensional chess
- Three-year mission
- ThreeTimes
- Three Lubak
- Three Mile Island
- Three Sides to Every Story
- Three Turn Bridge
- Threkkle
- Threlas ch'Lhren
- Threllian
- Threllvia
- Threllvia IV
- Threshold
- Threska II
- Thress
- Thriazhrovarasa sh'Meth
- Thrice written and thrice burned
- Thrichduk
- Thrifis Chovich
- Thrint
- Thrintarno zh'Lan
- Thris class
- Thrishia
- Thriv
- Thrix
- Throck
- Throck-haired shirt
- Throckmorton
- Throk
- Thron
- Through a Glass, Darkly
- Through the Looking-Glass, and What Alice Found There
- Through the Looking Glass
- Through the Looking Glass (episode)
- Through the Looking Glass (short story)
- Through the Mirror
- Through the Mirror, Issue 1
- Through the Mirror, Issue 2
- Through the Mirror, Issue 3
- Through the Mirror, Issue 4
- Through the Mirror, Issue 5
- Through the Valley of Shadows
- Thrush
- Thruster
- Thruzen
- Thrynn
- Thucydides
- Thucydides class
- Thue
- Thufir class
- Thugee
- Thulas
- Thule G'Dok Glemoor
- Thulium
- Thunder lily
- Thunderbird
- Thunderbird (disambiguation)
- Thunderchild
- Thunderchild class
- Thunderlizard class
- Thunderstorm
- Thunderstroke
- Thur chim Gliv
- Thurgood Marshall
- Thurl
- Thurl (disambiguation)
- Thuvis
- Thwa Minha
- Thy'kir Shran
- Thy'lek Shran
- Thy'lek Shran (mirror)
- Thylaster
- Thyme
- Thymerae
- Thymoxamine
- Thyner
- Thyrion VI
- Thysis
- Thyzin
- Thérèse Su
- Ti'Ana
- Ti'Mur
- Ti'Mur (mirror)
- Ti-Chen
- Ti Che
- Tia Daraan
- Tiananmen Square
- Tiantianium
- Tiaren
- Tiaru Jarok
- Tib'vor
- Tiba
- Tiber
- Tiber (disambiguation)
- Tiber River
- Tiber sector
- Tiberian sloth cat
- Tiberius
- Tiberius (Magna Roman)
- Tiberius (disambiguation)
- Tiberius Kirk
- Tiberius Sejanus Singh
- Tiberius class
- Tibet
- Tibidex
- Tibura Secundus
- Tiburon
- Tiburon (disambiguation)
- Tiburon (planet)
- Tiburon (planet) (mirror)
- Tic-tac-toe
- Tichar
- Tickle My Lobes and Tell Me That You Love Me
- Ticonderoga
- Ticonderoga class
- Tier Arooth
- Tieran
- Tiercel
- Tiercel class
- Tiercellus
- Tiercellus (disambiguation)
- Tierenios
- Tierra
- Ties of Blood and Water
- Tiet
- Tifel
- Tigan
- Tigan (disambiguation)
- Tigan VII
- Tigan central computer
- Tigan interface
- Tigan system
- Tigart Hedda
- Tigelis
- Tiger
- Tiger (disambiguation)
- Tiger FS-100
- Tiger FS-101
- Tiger FS-102
- Tihana Elkhur
- Tik'ik
- Tik'leth
- Tik'r Tholis
- Tika
- Tika cat
- Tikal Province
- Tikar Antol
- Tikelis
- Tikelis I
- Tikelis II
- Tikka Rillio
- Tiklor
- Tikopai
- Tikopai class
- Tiku
- Til'amin froth
- Til'k
- Tilar
- Tilar Peninsula
- Tilar plate
- Tiliul
- Tiljara
- Tillean Murat
- Tiller
- Tiller MiVeit
- Tillie
- Tillis
- Tillotson
- Tillum Drafar
- Tilly's shuttle
- Tilly (disambiguation)
- Tilo
- Tilting Point
- Tiluvus Gallery
- Tim
- Tim'pek
- Tim (disambiguation)
- Tim Abercrombie
- Tim Bradstreet
- Tim Earls
- Tim Henry
- Tim Jones
- Tim Lincoln
- Tim Lounibos
- Tim McAddis
- Tim Pennington
- Tim Roller
- Tim Russ
- Tim Watters
- Tima
- Timber weevil
- Timbisha
- Timbor
- Timbuktu
- Time
- Time's Arrow
- Time's Echo
- Time's Enemy
- Time's Orphan
- Time-pod
- Time-warp speed
- Time. And Time. And Time Again.
- Time (magazine)
- Time Amok
- Time Crime
- Time Line
- Time Lock
- Time Lord
- Time Out of Joint
- Time Squared
- Time and Again
- Time and Tide
- Time barrier
- Time bubble
- Time changer
- Time corridor generator
- Time crystal
- Time deceleration
- Time dilation
- Time for Yesterday
- Time ghost
- Time in a Bottle
- Time of Awakening
- Time of Cleansing
- Time of Knowing
- Time of the Scotsman
- Time perceptor
- Time portal
- Time to Time
- Time travel
- Time travel cabinet
- Time zone
- Timefleet
- Timeless
- Timeline
- Timelines
- Times (disambiguation)
- Times Square
- Timescape
- Timescape (Pocket Books)
- Timeship
- Timetrap
- Timewarp
- Timex
- Timicin
- Timidity
- Timmins
- Timmons
- Timofei Vasska
- Timol
- Timon of Athens
- Timonium
- Timor
- Timor II
- Timor system
- Timore
- Timoshenko
- Timot
- Timot Danlen
- Timoth Snead
- Timothy
- Timothy Cester
- Timothy Lynch
- Timothy Tormaline
- Timpek
- Timpok tree
- Timshel
- Timsonian Institute
- Timus Vod
- Tin
- Tin Man
- Tin man
- Tina (disambiguation)
- Tina Halloway
- Tina Jones
- Tina Lawton
- Tina Rogers
- Tina Weymouth
- Tindar
- Tingle Tangler
- Tingler 1
- Tinh Hoc Phuong
- Tini
- Tinker, Tenor, Doctor, Spy
- Tinnitus
- Tino Griffith
- Tinseltown Tattler
- Tinsha Monastery
- Tintagel
- Tinya Wazzo
- Tio'pek
- Tipitaka
- Tipot
- Tir
- Tir'tara
- Tir Berin
- Tir Kapov
- Tir Karna
- Tir Remara
- Tira Daraan
- Tirak
- Tiral
- Tiramisù
- Tiranax
- Tiraud
- Tirek VIII
- Tirek VIII native
- Tirellian stout
- Tiresias
- Tirethi class
- Tirian
- Tirim
- Tiris Jast
- Tiron
- Tiron (mirror)
- Tiros
- Tiros (disambiguation)
- Tiros Ardell
- Tiros II
- Tirrion
- Tirza Sirajaldin
- Tislin
- Tisseverlin Janna