shire / shyer are similar-sounding terms with different meanings (referred to as homophones). To better understand the differences, see below for definitions, pronunciation guides, and example sentences using each term. 👇
shire: (noun) a former administrative district of England; equivalent to a county. (noun) British breed of large heavy draft horse.
shyer: (adjective) short. (adjective) wary and distrustful; disposed to avoid persons or things.
shire: sh·AY·r
shyer: NA
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)