Multiple lists with phrases for keywords

Here's one way to do it in the query editor.  To see how it works, just create a blank query, open the Advanced Editor and replace the text there with the M code below. You can reference your keywords list instead of the hard-coded one shown. 

let
  Source = Table.FromRows(
    Json.Document(
      Binary.Decompress(
        Binary.FromText(
          "i45Wys9TSFTIyC8tTlWK1YlWKs8syQAK5MIFwPJJ+YklyNLpMD5Y1gnMiwUA",
          BinaryEncoding.Base64
        ),
        Compression.Deflate
      )
    ),
    let
      _t = ((type nullable text) meta [Serialized.Text = true])
    in
      type table [Phrase = _t]
  ),
  #"Changed Type" = Table.TransformColumnTypes(Source, {{"Phrase", type text}}),
  #"Added Custom" = Table.AddColumn(
    #"Changed Type",
    "Custom",
    each
      let
        keywords = {"boat", "mouse"},
        thisphrase = [Phrase],
        foundwords = List.Select(
          keywords,
          each Text.Contains(thisphrase, _, Comparer.OrdinalIgnoreCase)
        )
      in
        if List.Count(foundwords) > 0 then "Y" else "N"
  )
in
  #"Added Custom"

Pat