"BREATHE" and "BREATH"
"Breathe" means to inhale and exhale. "Breath" refers to a single inhalation or exhalation. Ex.: Remember to breathe deeply and relax. She took a deep breath before diving.
"ACCEPT" and "EXCEPT"
"Accept" means to receive or agree to something. "Except" means to exclude or leave out. Ex.: Please accept our apologies. Everyone is invited, except for Tom.