There was once a difference in classification that a Dwarf was below 4' 10, but above 4'' a Midget being 3'- 4' at maturity. However, certainly in England the terms are seen as inter-changeable. Ironically I am good friends with a genetically short family.
Just an example. A sweet onion is about 7% sugar, in-which about 40% of that is Fructose. A white onion (or any non-sweet type) is about 5% sugar, in-which less than 40% is Fructose. The amount of Fructose you are getting from even a few ounces of onion is minute. This Fructose is also bound with the flesh (Fiber) and other forms of sugar (Sucrose and Glucose).
The USDA database has the sugar breakdown for many foods if you select the full report. Here is the result for raw apples, which contain 5.9g fructose per 100 grams. Acorn squash doesn't show the sugar breakdown detail, but butternut is similar and .99g fructose per 100 grams. Sweet potatoes are slightly better on fructose (0.70g per 100g), but higher in other soluble sugars than butternut squash.