How about 'Autodecapitate'?
On Command, though, 'Die' is still the oldest and best. 'Flee' is all good, but bear in mind the 1 round duration. 'Flee' suddenly becomes a waste of time, doesn't it? 'Die', on the other hand, opens a nice coup de grace opportunity.
In general though, Spell Focus: Enchantment and Greater Spell Focus: Enchantment aren't worth it. Yes, you can have DC 21 Hold Persons by 3rd level, but after HP there's little in the way of punitive Enchantment spells (other than Greater Command). Better bets are Evocation (which does for nearly all of the clerical direct damage spells, and good old Implosion for top-level fun) or Necromancy (which controls all the Inflict X Wounds family, and the instant death type spells such as Slay Living and Destruction).
On balance, it's probably not worth investing too much into Spell Foci. Perhaps one or two in Evocation and Necromancy, but the cleric has a lot of other feats to look at, and a limited number to get. You'll need to look at Metamagic, you'll want to look at Item Creation (to brew Potions of Cure Wounds and the like) and you may want to throw in a couple of combat-orientated feats (especially if you're a buff and go type assault cleric). If you can spare some for Spell Focus at the end of the day, go for it. But it's certainly not in the same priority league as it is for wizards or sorcerors.