- Trinity Christian College
- Trinity College (Connecticut)
- Trinity College (District of Columbia)
- Trinity College (Illinois)
- Trinity College (Vermont)
- Trinity River
- Trinity Sunday
- Trinity University
- Trinity Valley Comm Coll-Henderson County Campus
- trinket
- trinketed
- trinketing
- trinkets
- trinomial
- trinomials
- trinucleotide
- trio
- triode
- triodes
- triol
- triolet
- triolets
- triols
- trios
- triose