1. To speak rhetorically.

2. To deliver a set speech or oration rhetorically; to speak by rhetorical rule and for mere rhetorical effect.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• declate,
• declair,
• reclaime,
• declard,
• declaed,
• declairs,
• declaire,
• reclam,
• declin,
• declain,
• declar,
• eclaim,
• decalim,
• deklaim,
• decharmn,
• declaime,
• delcie,
• dentatim,
• decyatin,
• Decyain

• decline,
• claim,
• declining.

The adverb form of the word "declaim" is "declaimingly".

The adjective form of the word "declaim" is "declamatory".

The plural form of the word "declaim" is "declaims"

The singular form of the word "declaim" is "declaimer"