lagniappe or lagnappe /lanˈyap/

1. Something given beyond what is strictly required
2. A gratuity

• river-jacks
• river-jack viper
• riverless
• riverlike
• riverman
• rivermen
• river mouth
• river mouths
• river mussel
• river mussels
• river novel
• river-rat
• river-rats
• rivers
• river sand
• riverscape
• riverscapes
• riverside
• riversides
• river-terrace
• river-terraces
• river-tide
• river-tides
• riverwalk
• riverwalks