Noun
words of one syllable pl (plural only)
(idiomatic, usually preceded by in) Simple, clear, straightforward language; blunt language.
You can say a lot in a little time, if you stick to words of one syllable. Lois McMaster Bujold
MONOSYLLABIC, adj. Composed of words of one syllable ... Commonly Saxon that is to say, words of a barbarous people destitute of ideas and incapable of any but the most elementary sentiments and emotions. Ambrose Bierce