Antonym: hearer. Similar words: speak, speak up, speak for, to speak of, so to speak, peak, maker, lawmaker. Meaning: ['spɪːkə(r)] 
n. 1. someone who expresses in language; someone who talks (especially someone who delivers a public speech or someone especially garrulous) 2. electro-acoustic transducer that converts electrical signals into sounds loud enough to be heard at a distance 3. the presiding officer of a deliberative assembly.
n. 1. someone who expresses in language; someone who talks (especially someone who delivers a public speech or someone especially garrulous) 2. electro-acoustic transducer that converts electrical signals into sounds loud enough to be heard at a distance 3. the presiding officer of a deliberative assembly. 
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121. The president addressed the students on the speaker.
122. The speaker was given a warm welcome / reception.
123. The speaker lashed at the government for its inaction.
124. The speaker tiraded against the government's policies.
125. The speaker strung together a series of jokes.
126. It's not polite to howl down a speaker.
127. A tinny voice issued from a speaker.
128. I've a query to put to the last speaker.
129. They hurled abuse and insults at the speaker.
130. The speaker was clamoured down by the audience.
131. The speaker tilted at the government's policies.
132. Most of the audience seemed ill-disposed towards the speaker.
133. A public speaker needs a voice that carries .
134. The speaker leveled his remarks at the headmaster.
135. I'd like to put a question to the speaker.
136. The speaker gave an interesting presentation on urban transport.
137. The speaker prefaced her remarks with a joke.
138. The speaker had got confused,(sentencedict.com) and started contradicting himself.
139. The speaker thundered against the government's policy.
140. Pay attention to the body language of the speaker.
141. She came back at the speaker with some questions.
142. The speaker faces his opponent down.
143. The speaker was now warming to her theme.
144. He is a fluent speaker of Hebrew.
145. The speaker had great powers of utterance.
146. The speaker drove home his point.
147. He earned/established/gained/acquired a reputation as an entertaining speaker.
148. The speaker was completely nonplussed by the question.
149. He was a notoriously verbose after-dinner speaker.
150. There's no sound coming out of the right-hand speaker.