Learn English – Quantize vs Discrete

I think there's another difference: poultry is a subset of fowl. Either poultry or fowl can refer to domesticated or farmed animals. When referring to wild game, however, (e.g., pheasant, partridge, wild turkey), fowl is more applicable, whereas poultry is not.

Merriam-Webster's defines as follows:

poultry: domesticated birds kept for eggs or meat

fowl: (1) a bird of any kind (2) any of several domesticated or wild gallinaceous birds

Interestingly enough, my online dictionary says that gallinaceous includes "domestic poultry and game birds."

We never say, I want an iced cream, or cream with ice, or cream which is iced, or anything else. We just say, I want ice cream. My point is when something is un-modifiable, that means it exists as a single unit. It may appear to have two words, but those two words, spoken separately, would have different meanings, so that particular word needs to be spoken in one breath to convey a particular meaning. So 'ice cream' is a one word. It has a distinct meaning.

Now consider, 'beautiful day.' Both Beautiful and Day have their own separate meanings and spoken together they convey a different meaning. Yet 'beautiful day' is not one word, because same can be expressed differently like, lovely day, pleasant day, awesome day, etc. More importantly, in 'beautiful day,' beautiful is an adjective. And if we start representing ice cream as having two words, would we say ice is an adjective here?