The word "word-hoard" is correct and usable in written English.
You can use it to refer to a large collection or store of words, such as a writer's extensive vocabulary. For example, you might say, "She had a remarkable word-hoard, which she put to good use in her stories and essays."
I organised my growing word-hoard into nine glossaries, divided according to terrain-type: Flatlands, Uplands, Waterlands, Coastlands, Underlands, Northlands, Edgelands, Earthlands and Woodlands.
Heaney's lyrical, muscular, aural poetry, like Montague's, delved into the Irish past and into what Heaney called the "word-hoard" of the Irish landscape.
In school?" Part of Mamet admires this foulmouthed, piratical crew, who live by their wits and by the power of their larcenous word-hoard.
And so his word-hoard includes, apart from the standard simple signifiers, such oddities as "sordid", "disastrous", "immaculate", "pathetic" and "devastating".
"I intend to rally my memory and write in these pages you provide a small word-hoard of my own," Cockcroft wrote.
This is why Landmarks moves over its course from the peat-deep word-hoard of Hebridean Gaelic, through to the fresh-minted terms and stories of young children at play on the outskirts of a Cambridgeshire town.
He inherited the stiff techniques, plain imagery, and restricted range and subject matter the traditional "word hoard"—of preliterate song.
Those of us interested in the upkeep of the nation's word hoard always look forward to the annual unveiling of the Collins dictionary "words of the year" list.
As for my own contributions to the word hoard, in two decades of newspaper journalism I think I only twice came up with anything new.
His knees were shot, he added, holding up the two canes he walked with, and he had begun doing daily crossword puzzles to refresh his word hoard.
The entire novel is written in a version of Old English and so I had to dig into a word hoard of ancient terms for everyday objects.
