The difference between Orate and Speak

When used as verbs, orate means to speak formally, whereas speak means to communicate with one's voice, to say words out loud.

Orate is also adjective with the meaning: competent in oracy.

Speak is also noun with the meaning: language, jargon, or terminology used uniquely in a particular environment or group.

check bellow for the other definitions of Orate and Speak

Orate as a verb:

To speak formally; to give a speech.
Orate as a verb:

To speak passionately; to preach for or against something.

Orate as an adjective:

Competent in oracy; having good speaking skills.

Speak as a verb (intransitive):

To communicate with one's voice, to say words out loud.

Examples:

"I was so surprised I couldn't speak."

"You're speaking too fast."
Speak as a verb (intransitive):

To have a conversation.

Examples:

"It's been ages since we've spoken."
Speak as a verb (by extension):

To communicate or converse by some means other than orally, such as writing or facial expressions.

Examples:

"He spoke of it in his diary."

"'Speak to me only with your eyes."

"Actions speak louder than words."
Speak as a verb (intransitive):

To deliver a message to a group; to deliver a speech.

Examples:

"This evening I shall speak on the topic of correct English usage."
Speak as a verb (transitive):

To be able to communicate in a language.

Examples:

"He speaks Mandarin fluently."
Speak as a verb (transitive):

To utter.

Examples:

"I was so surprised that I couldn't speak a word."
Speak as a verb (transitive):

To communicate (some fact or feeling); to bespeak, to indicate.
Speak as a verb (informal, transitive, sometimes, humorous):

To understand (as though it were a language).

Examples:

"Sorry, I don't speak idiot."

"So you can program in C. But do you speak C++?"
Speak as a verb (intransitive):

To produce a sound; to sound.
Speak as a verb (transitive, archaic):

To address; to accost; to speak to.

Speak as a noun:

language, jargon, or terminology used uniquely in a particular environment or group.

Examples:

"Corporate speak; IT speak."
Speak as a noun:

Speech, conversation.