What's the difference between hereon and whereat?

Hereon


Definition:

  • (adv.) On or upon this; hereupon.

Example Sentences:

  • (1) 9.23pm GMT Expect the reporters to get even more speculative and desperate from hereon in.
  • (2) We report hereon a 34-year-old woman who presented with recurrent attacks of uveitis unresponsive to treatment with steroids.
  • (3) It is right to state that some 18 months later, as part of an examination of material in the New York Times, the CPS signalled an intention hereon to take a broader view of the relevant legislation.
  • (4) The qualities that we showed today, we’re going to need from hereon in.
  • (5) But from hereon in, every penny will have to count.

Whereat


Definition:

  • (adv.) At which; upon which; whereupon; -- used relatively.
  • (adv.) At what; -- used interrogatively; as, whereat are you offended?

Example Sentences:

  • (1) ), whereat measurements can be taken either using cylindrical graphitic walls or "no walls".