The words bark, barque sound the same but have different meanings and spellings. Why do bark, barque sound the same even though they are completely different words?
The answer is simple: bark, barque are homophones of the English language.
The harsh sound uttered by a dog.
A sound, such as a cough, that is similar to a dog's bark.
To utter a bark.
To make a sound similar to a bark: "The birds bark softly, sounding almost like young pups” ( Charleston SC News and Courier).
Variant of bark3.
Definitions from The American Heritage® Dictionary of the English Language, 4th Edition and Wordnik.
Homophones (literally "same sound") are usually defined as words that share the same pronunciation, regardless of how they are spelled.