Alkalides are chemically similar to the electrides, which are salts with trapped electrons acting as anions.
ˈælkəlˌaɪdz ɑːɹ kˈɛmɪkli sˈɪmɪlɚ tə ðɪ ᵻlˈɛktɹaɪdz, wˌɪtʃ ɑːɹ sˈɔlts wɪð tɹˈæpt ᵻlˈɛktɹɑːnz ˈæktɪŋ æz ˈænaɪənz.