• keap second,
• peap second,
• oeap second,
• lwap second,
• lsap second,
• ldap second,
• lrap second,
• l4ap second,
• l3ap second,
• lezp second,
• lesp second,
• lewp second,
• leqp second,
• leao second,
• leal second,
• lea- second,
• lea0 second,
• leap aecond,
• leap zecond,
• leap xecond

The adjective form of the word "leap second" is "leap-second".

The plural form of the word "leap second" is "leap seconds".

The singular form of the word "leap second" is "leap second".