Substantial Definition: The definition of substantial is something that is real, considerable or strong. Synonyms: Actual, Material, Tangible, Palpable, Perceptible Antonyms: Illusive, Unsubstantial, Illusory, Unreal, Chimerical

Stubborn Definition: The definition of stubborn is being determined not to obey or yield. Synonyms: Adamant, Fixed, Bull – headed, Obdurate, Tenacious Antonyms: Adaptable, Complaint, Irresolute, Malleable, Pliable

Stupid Definition: The definition of stupid is a person with less than normal intelligence or a boring situation. Synonyms: Dense, Dull, Slow, Thick, Unintelligent Antonyms: Bright, Clever, Intelligent, Keen, Smart

Suitable Definition: The definition of suitable is someone or something that is appropriate or acceptable in a particular situation. Synonyms: Appropriate, Eligible, Pertinent, Relevant, Befitting Antonyms: Unsuitable, Inappropriate, Irrelevant, Unseemly, Untimely

Sudden Definition: The definition of sudden is not expected, or happening without warning. Synonyms: Momentary, Brief, Rapid, Quick, Unexpected Antonyms: Awaited, Gradual, Anticipated, Progressive