The reasoning behind this is unknown, although it is likely due to a number of episodes in Seasons 18-20 having noticeable timing issues.
combined by a word that ends the first and starts the second (e.g., WHEEL OF FORTUNE COOKIE, which combines ' Wheel of Fortune' and 'fortune cookie'). Before & After: Introduced on February 27, 1989.
For its first season of use, its category strip had a crayon drawing of a house. Around the House: Introduced on Septemas a more specific subset of Thing, focusing on things within or close to a household.