Ordnance vs. Ordinance
Wrong: The city ordnance forbids double-parking.
Right: The city ordinance forbids double-parking.
Ordnance refers to munitions, while an ordinance is a local law. Confusing ordnance with an ordinance can be an explosive error.
Eek vs. Eke
Wrong: She’s just trying to eek out a living.
Right: She’s just trying to eke out a living.
I chuckle every time I come across this one. Eek may be a simple misspelling of eke (to obtain with great difficulty), but I always picture someone seeing a mouse and shrieking.
More next time.