hy·dro·naut 
(hīdrō-nôt′)
(hīdrō-nôt′)n.
One trained to pilot, navigate, or otherwise participate as a crew member of a deep-sea vessel.
- 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
- Triple Crown
- triple-decker
- triple-digit
- triple digits
- triple-double