It's actually "Adroit" (skilful, agile, cunning, ingenious - all highly appropriate to a submarine) and I use it quite frequently, but I take your point. Not everyone has a vocabulary these daysSo for a first batch, Attack, Advance, Archer, Arrow, Assail, Aware (not sure about Acute or Adriot doable, but less resonance, how often have you used the term adriot in conversation)
oldsig