The term 'Something to Fall Back On' can be represented by five different crossword solutions: REAR (4 letters), PRAT (4 letters), MAT (3 letters), HEINIE (6 letters), and PLANB (5 letters). REAR is an informal term for the backside of a person or animal, while PRAT is a slang term for a foolish or stupid person. MAT is an abbreviation for a matress, which is a piece of furniture used for sleeping. HEINIE is a slang term for the buttocks, and PLANB is an acronym for a backup plan. All of these terms represent having something to fall back on in times of need.