We don't have synonyms for leics yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are leis, leica and laics.
(n) :
(UK, postal) Abbreviation of Leicestershire. [An inland county of England bordered by Nottinghamshire, Lincolnshire, Rutland, Northamptonshire, Warwickshire and Derbyshire.]
(n) :
(UK, postal) Abbreviation of Leicestershire. [An inland county of England bordered by Nottinghamshire, Lincolnshire, Rutland, Northamptonshire, Warwickshire and Derbyshire.]