Wail is a loud cry of grief or pain. A whale is a huge sea mammal. Memory hook: a whale is the huge animal, and both whale and huge carry an h.
The core difference
Wail is a loud cry of sorrow; whale is a very large sea mammal.
- wail — to cry out loudly in grief or pain, or the cry itself: The baby wailed all through the night.
- whale — a very large sea mammal that breathes through a blowhole: They watched a whale breach just off the coast.
How to tell them apart
In many accents these two are pronounced alike, so the confusion is a spelling one. Think about whether the sentence is about a sound or an animal. A sound of distress is a wail; something that swims is a whale.
To remember, notice that wail has the letters a-i-l, as in ail, which hints at pain. Whale ends in the same letters as male and scale, and has the extra h, like the h in huge. A typical slip is writing that someone was whaling in grief.