- thorium.
- a suffix forming nouns of action (birth) or abstract nouns denoting quality or condition (depth; length; warmth).
- a suffix used in the formation of ordinal numbers (fourth, tenth), in some cases, added to altered stems of the cardinal (fifth; twelfth).
- variant of -eth1: doth.
- Thursday.
- Territory of Hawaii.
- Thailand
- thorium
- indicating an action or its consequence
- indicating a quality
- forming ordinal numbers