father / fother 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. 👇
father: (noun) a male parent (also used as a term of address to your father). (noun) `Father' is a term of address for priests in some churches (especially the Roman Catholic Church or the Orthodox Catholic Church); `Padre' is frequently used in the military. (noun) a person who holds an important or distinguished position in some organization. (noun) God when considered as the first person in the Trinity.
fother: NA
father: f·AA·dh·er
fother: NA
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)