research - Where can I find a list of words that contain one or more spaces, such as ice cream?

This post asked if ice cream was one word or two.

John Lawler's comment seems logical and accurate to me:

"Space: The Final Frontier. The answer to the question is "Yes". That
is, some people consider it one word, and others two, so it is
considered one word or two. Seriously, word is not well-enough defined
to allow such precise counting."

J.R. also makes a great point:

"It depends on your definition of "word". For most situations, if a
two-word phrase gets its own entry in the dictionary, then I regard it
as a single word. But Scrabble players would disagree, and they'd all
scream if I tried to play ICECREAM."

Lastly, JeffSahol makes another fine point with

"Here's a possible test: if it could be listed by the US Army in

reverse order (as in "Sauce, Tomato"), then it's two words.
Unfortunately, they don't put ice cream in MREs. :)"

Where/How can I find a list of all English words that contain more than one space, such as ice cream, (but not including phrases like tomato sauce)?

_{I have asked a question here before and it was closed and deleted for being off-topic, but it was very much on-topic and relevant. If this question also gets closed, I will lose all hope in this community.}

Answer

Words that function as one word but appear as two are called open compounds. They are one of three types of compound words, the other two of which are closed (e.g., pancake) and hyphenated (e.g., half-baked).

This document covers compound words extensively. This one gives several examples, such as living room, full moon, real estate, and coffee table.

For more examples, you may search online for open compounds.

Additionally, you may view this page, which will clarify the different types of compounds. Here are some examples from that page: blood pressure, light year, half sister, vice president. Bear in mind that some open compounds may be hyphenated or closed. That is typically a stylistic choice.