Some words that rhyme with "gun" include:

• One: This is a one-syllable word that rhymes perfectly with "gun".
• Done: Another one-syllable word that rhymes perfectly with "gun".
• Run: This is a one-syllable word that rhymes perfectly with "gun".
• Fun: Another one-syllable word that rhymes perfectly with "gun".
• Son: This is a one-syllable word that rhymes perfectly with "gun".

There are many other words that rhyme with "gun," including two-syllable words like "begun" and "outdone".