Not if you're American, it ain't!
Offense, defense, realize, initialize, center, theater, favorite, color, ta-MAY-toe, 'errrrrb... so there!
Oh, and just to pre-empt the people who will inevitably reply that there's an "H" in "herb"... there's an "H" in "honest" as well.
I'm not American, and this is essentially a London forum, and I don't like US realization* of English due to laziness or ignorance on the part of English English speakers.
the use of 'z' was originally an English thing, and still preferred by the OED.
I'm not American, and this is essentially a London forum, and I don't like US realization* of English due to laziness or ignorance on the part of English English speakers.