As nouns the difference between owler and yowler
is that owler is (northern english dialect) the alder tree while yowler is someone who, or something which yowls.
owler
English
Noun
(
en noun)
(Northern English dialect) The alder tree.
(dated) A smuggler of sheep or wool (see owling).
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yowler
English
Noun
(
en noun)
Someone who, or something which yowls.
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