"Four Letter Word" is the fourth single from English pop singer Kim Wilde's sixth studio album, Close (1988). The song was issued as a single in November 1988, marking Wilde's last release of a track written by her father and brother, who had written the majority of her early hits together. "Four Letter Word" became Wilde's third consecutive UK top-10 single from Close, reaching number six. It also peaked within the top 10 in Belgium, Denmark, Ireland, and the Netherlands. An extended version as well as a "late night" remix of "Four Letter Word" were released on the 12-inch and CD singles.
^Four Letter Word (Japanese mini-CD single liner notes). Kim Wilde. MCA Records. 1989. 10P3-6107.{{cite AV media notes}}: CS1 maint: others in cite AV media (notes) (link)
^Four Letter Word (UK 12-inch single vinyl disc). Kim Wilde. MCA Records. 1988. KIMT 10.{{cite AV media notes}}: CS1 maint: others in cite AV media (notes) (link)
^Four Letter Word (UK CD single liner notes). Kim Wilde. MCA Records. 1988. DKIM 10.{{cite AV media notes}}: CS1 maint: others in cite AV media (notes) (link)
^Four Letter Word (European mini-CD single liner notes). Kim Wilde. MCA Records. 1988. 257 696-2.{{cite AV media notes}}: CS1 maint: others in cite AV media (notes) (link)