Word Study
ungrammatical
OXFORD DICTIONARY
ungrammatical, adj. contrary to the rules of grammar.
Derivative
ungrammaticality n. ungrammatically adv. ungrammaticalness n.
ROGET THESAURUS
ungrammatical
Solecism
N solecism, bad grammar, false grammar, faulty grammar, slip of the pen, slip of the tongue, lapsus linguae, slipslop, bull, barbarism, impropriety, ungrammatical, incorrect, inaccurate, faulty, improper, incongruous, solecistic, solecistical.For further exploring for "ungrammatical" in Webster Dictionary Online