wailed / whaled 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. 👇
wailed: (verb) cry weakly or softly.
whaled: (verb) hunt for whales.
wailed: w·EY·l·d
whaled: NA
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)