Favourite words, usages, phrases etc

I like archaic one-syllable words that were coined so long ago that there were plenty of single syllables still available for that purpose

this concept is delightful

And yet, even among all possible 2 letter words, there are plenty that aren't being used.

Out of the 26 possible words beginning with A, there's at least 10 good words just going to waste:

AA
AB
AC
AD
AE
AF
AG
AH
AI
AJ
AK
AL
AM
AN
AO
AP
AQ
AR
AS
AT
AU
AV
AW
AX
AY
AZ