field·stone 
(fēldstōn′)
(fēldstōn′)n.
A stone occurring naturally in fields, often used as a building material.
- trip
- tripalmitin
- tripartite
- triparttition
- tripe
- tripedal
- tripeptide
- tripetalous
- trip hammer
- triphammer
- trip-hammer
- triphenylmethane
- triphibian
- trip-hop
- triphosphate
- triphosphopyridine nucleotide
- triphthong
- triphthongal
- tripinnate
- tripinnately
- triplane
- triple
- triple agent
- triple alpha process
- triple bond