[compsciphd]

Hebrew is already written like that. A language of all consonants with diacritic marks (nikud/nikudot) to connote vowels.

Though in practice unless you're a religious person reading out a printed hebrew bible (scribal parchment ones don't have them) or prayer books or a child in Israel who is learning to read, you don't normally use them (i.e. most things won't print them and use an expanded consonant form where letters when paired in certain ways connote the vowels) unless there would be confusion to understanding the word without the vowels (as a simple example, without vowels, the word key and programmer would be indistinguishable, as spelled the same way).