lagniappe or lagnappe /lanˈyap/

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

• operational amplifier
• operational amplifiers
• operationalism
• operationalist
• operationalists
• operationally
• operational research
• operationism
• operationist
• operationists
• operations
• operations research
• operative
• operatively
• operativeness
• operativenesses
• operatives
• operative words
• operator
• operators
• opercula
• opercular
• operculate
• operculated
• operculum