Fallback is a compound word. Falloff and fallout are compound words.
The answer is become.
teardrop gumdrop raindrop dewdrop backdrop
airtimeanytimebedtimedowntimelunchtimemealtimeovertimeplaytimesometimespringtimesummertimetimebasetimeouttimesharewintertime
zebralicious
One such word is whenever.
Doable
Applesauce is a compound word that starts with "a".
A word to describe you starting with the letter c is cute.
Balloon.
mousehouse
Bankteller