dialogue and dialog

dialogue: an exchange of ideas or opinions between two or more persons, parties or groups in different contextes including that of literary works, politics, religion; overall conversations

dialog: accepted misspelling of dialogue 

Just sayin'..

affect and effect

affect: to act upon or influence; alter

effect: a result

My accent was not, in effect, affected by the southerners around me. 

since, sense, scents, cents, cense and sence

since: ago, before now; from a past time to the present

sense: a feeling or perception; a faculty or function of the mind

scents: odors or smells

cents: monetary units 

cense: to perfume with incense

and just for good measure..
sence: slang for marijuana

Since I used my last cents to purchase sence, I can't afford to cense the scents. I sense this may be a problem.