Recommended by Clarinha C1R
"FARTHER" and "FURTHER"
"Farther" refers to physical distance. "Further" relates to metaphorical or non-physical distance. Ex.: The park is farther than I thought. We need to look further into this issue.
"COMPLEMENT" and "COMPLIMENT"
"Complement" means to complete or enhance. "Compliment" means to praise or express admiration. Ex.: The sauce complements the dish perfectly. She complimented him on his presentation.