• waterlife,
• wasteline,
• watermine,
• waterin,
• waterring,
• aderline,
• faterlike,
• leaterlike,
• quatervine,
• watereline,
• waterlne,
• waterlin,
• watterline,
• waterliine,
• waterlinee,
• acervline,
• waterrie,
• wherline,
• waterminte,
• watterminte

• water lily,
• water hole,
• waterleaf,
• water elm,
• water wheel,
• water line,
• waterlogged,
• waterwheel,
• water lemon,
• water level,
• waterless,
• waterloo.

The adjective form of the word "waterline" is "waterline". It remains the same in both noun and adjective form.

The plural of the "waterline" can be the "waterlines".

The singular of the "waterline" can be the "waterline".