All the best—is used as a farewell or to close an informal letter.
Apparition vs Phantasm vs Phantom vs Wraith vs Ghost vs Spirit vs Specter vs Shade vs Revenant
Apparition, phantasm, phantom, wraith, ghost, spirit, specter, shade and revenant all mean a visible but immaterial appearance of a person or thing, especially a likeness of a dead person or of a person or thing that is not physically present.
All right guy vs Right guy
All right guy —(coll.) a reliable or trustworthy person.
All kinds of
Avoid this awkward colloquialism. Use many or much instead.
Apparent vs Illusory vs Seeming vs Ostensible
Apparent, illusory, seeming and ostensible all mean not really or actually being what it appears to be.
All I know is vs Alls I know is
All I know is the correct phrase.
Apology vs Apologia vs Excuse vs Plea vs Pretext vs Alibi
Apology, apologia, excuse, plea, pretext and alibi denote the reason or reasons offered in explanation or defense of something (as an act, a policy, or a view).
All right for you vs All right with you
All right for you—usually accompanies a threat of revenge as said by a child angry at a playmate.
Apex vs Vertex
Apex and vertex are so often used interchangeably with reference to the tip or top point of a cone, a pyramid, or a conic section that a fundamental difference in implications is often ignored.
All-red route vs Red route
All-red route—(UK hist., also: all-red line) a telegraph line lying throughout in British territory.
All vs alls
Use all, never alls.
Aperture vs Interstice vs Orifice
Aperture, Interstice and Orifice denote an opening allowing passage through or in and out.