The word is earful. It means a prolonged amount of talking.
The word making is a verb. It is the present participle of the verb make.
Boring
orate
Lengthy is an adjective I think lengthen is the verb
The abstract noun form of the adjective 'lengthy' is lengthiness, a word for a quality; a word for a concept.
Making can be several parts of speech; give the whole sentence, please! I.e., "Making a lot of money is my main goal!" or, "I am making a hard choice." The base word, to make, is a verb.
Discourse (usually a noun meaning a dialogue, discussion, or debate) can also be used as a verb, with the connotation of making a lengthy expository speech. The verbs "discuss" or "expound" are synonyms.
A rhyming word pair for lengthy tune is long song
she looked at the crowd rakishly when making her speech.
long
The valedictorian was overflowing with ebullience while he was making his speech.
Lengthy is an adjective.