Synonyms for Lastingness

Synonyms starting with letter I

• imperishability

  sturdiness over time
• infinity

  period
• intestinal fortitude

  sturdiness over time
• instance

  period
• instant

  period
• interval

  time, period
• immutability
• indestructibility
• immortality
• immovability
• integrity
• inalterability
• immutableness
• invariability