gaffe or (rare) gaff /gaf/

A blunder

• convivialities
• conviviality
• convivially
• conviving
• convo
• convocate
• convocation
• convocational
• convocationist
• convocationists
• convocations
• convoke
• convoked
• convokes
• convoking
• convolute
• convoluted
• convolutedly
• convolution
• convolutional
• convolutions
• convolve
• convolved
• convolves
• convolving