KEY: Principal.
SYN: Highest, first, main, leading, chief, primary, foremost,pre-eminent, prominent.
ANT: Inferior, subordinate, secondary, supplemental, subject,auxiliary, minor.

• Die
• Diet
• Differ
• Difference
• Differentiate
• Differentiation
• Difficult
• Difficulty, [See DIFFICULT]
• Diffident, [See MODEST]
• Diffuse
• Digest \v
• Dignified
• Dignify
• Digress, [See DEVIATE]
• Dig, [See DELVE]
• Dilapidation
• Dilate
• Dilatory
• Dilemma
• Diligence
• Dimension
• Diminish
• Diminutive, [See DIMINISH_and_SMALL]
• Dimness, [See DIM_and_OBSCURE]
• Dim, [See JUST_and_HONEST]