Contradiction with Proverbs 29:11
A fool utters all his mind, but a wise man keeps it in until afterwards, contrasted with Job 32:18 which suggests expressing one's feelings.
Proverbs 29:11: A fool uttereth all his mind: but a wise [man] keepeth it in till afterwards.
Contradiction with Ecclesiastes 5:2
Advises not to be rash with words and to let words be few, conflicting with the expression of speaking due to fullness of spirit in Job 32:18.
Ecclesiastes 5:2: Be not rash with thy mouth, and let not thine heart be hasty to utter [any] thing before God: for God [is] in heaven, and thou upon earth: therefore let thy words be few. [thing: or, word]
Contradiction with James 1:19
Encourages being slow to speak, whereas Job 32:18 emphasizes the urgency of speech due to internal compulsion.
James 1:19: Wherefore, my beloved brethren, let every man be swift to hear, slow to speak, slow to wrath:
Contradiction with Proverbs 10:19
Warns that in the multitude of words there is sin, whereas Job 32:18 suggests an impulse to speak driven by the spirit.
Proverbs 10:19: In the multitude of words there wanteth not sin: but he that refraineth his lips [is] wise.
Contradiction with Proverbs 17:27
Praises using words sparingly as evidence of knowledge, in contrast to Job 32:18 which describes being compelled to speak.
Proverbs 17:27: He that hath knowledge spareth his words: [and] a man of understanding is of an excellent spirit. [an...: or, a cool]