Synonyms for grumpy Updated: 26-10-2024 by Wikilanguages.net share facebook share twitter Some common synonyms of grumpy are: grumpy [a.] Sullen, grum, sour, surly, irritable. All 🔎︎ Synonyms of grumpygrumpy [a.] Sullen, grum, sour, surly, irritable. Read More about: grumpy