• stemboat,
• stamboat,
• ateamboats,
• zteamboats,
• xteamboats,
• dteamboats,
• eteamboats,
• wteamboats,
• sreamboats,
• sfeamboats,
• sgeamboats,
• syeamboats,
• s6eamboats,
• s5eamboats,
• stemboats,
• steemboats,
• steam boats,
• staibolts,
• Steem Boats,
• Steam Boates

• steenbok,
• steam bath,
• stamboul,
• stanback,
• steamboat,
• stambaugh,
• Stumbaugh.

The adjective form of the word "steamboats" is "steamboat".