Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun grimness

2 senses of grimness

Sense 1
ghastliness, grimness, gruesomeness, luridness -- (the quality of being ghastly)
       => frightfulness -- (the quality of being frightful)

Sense 2
asperity, grimness, hardship, rigor, rigour, severity, severeness, rigorousness, rigourousness -- (something hard to endure; "the asperity of northern winters")
       => difficulty, difficultness -- (the quality of being difficult; "they agreed about the difficulty of the climb")