In my mission to identify which hyphenated words are Tolkien original compositions, I have use the Oxford English Dictionary’s word on whether something like “Moss-green” is only ever found as “mossgreen” or “moss green” and if the hyphenated form is not attested, I’ve given it the “JRRT” tag.
Further, if the hyphenated form is found in OED, but the only example is from Tolkien’s work, I’m giving him credit for putting together this form as his own intentional style.
“Mountain-king“, however, has three examples, one of which is Tolkien’s and one of which comes earlier.
I would love to hear from you, Word Fans! This is the type of art-work that has crept into what I thought would be the cut-and-dry list-making of this project.
Thanks for your notes, Word Fans – I have reached clarity. Since the other examples of “Mountain king” do not have the hyphen (unbehyphenated?), I am giving JRRT credit for an original-ish spelling.