Perfect Rhymes:
* There aren't any perfect rhymes for "sonar" in standard English.
Near Rhymes (Slant Rhymes):
* Boner: This is a very informal and possibly offensive word, so use it with caution.
* Honor: This is a more respectable option, but it's still a slant rhyme.
* Conner: This is a name, which might work depending on your context.
Eye Rhymes:
* Savor: This word is spelled similarly to "sonar" but has a different pronunciation.
Other Options:
* Sonar device: This uses the word itself in a phrase to create a rhyme.
Ultimately, the best rhyme for "sonar" will depend on the context and your desired level of formality.