liar / lier / lyre 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. 👇
liar: (noun) a person who has lied or who lies repeatedly.
lier: NA
lyre: (noun) a harp used by ancient Greeks for accompaniment.
liar: l·AY·er
lier: NA
lyre: l·AY·r
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)