Facing Amiguity with List of values Entity

I had list of values like below

  1. Display Name = all the time , Value = all the time , Synonyms = all the time
  2. Display Name = sometime , Value = sometime , Synonyms = sometime

When user says " it just doesn’t all the time . The user is getting Ambiguity response.

As you suggested, I have enclosed the Synonyms value in double quotes like below

  1. Display Name = all the time , Value = all the time , Synonyms = "all the time"
  2. Display Name = sometime , Value = sometime , Synonyms = "sometime"

But still, It’s not getting resolved and again user is getting ambiguous response.

How to stop the user from getting ambiguous response.