atavism (n.)
- age
- ancientness
- antiquity
- eld
- eldership
- engram
- lapse
- memory
- mind
- oldness
- primitiveness
- primogeniture
- recollection
- recrudescence
- recurrence
- regression
- relapse
- remembrance
- renewal
- return
- reversal
- reverse
- reversion
- senility
- seniority
- setback
- skill
- souvenir
- throwback
- venerableness
