You may have often noticed that a guestspeaker who is invited to speak about a specific organisation or project may bring his own display board with him.
Working with Teenagers (1994)
All students do a final year project and the course is supplemented with guestspeakers.
Times, Sunday Times (2014)
The guestspeaker is given a glowing introduction.
Christianity Today (2000)
Definition of 'speaker'
speaker
(spiːkəʳ)Explore 'speaker' in the dictionary
countable noun
A speaker at a meeting, conference, or other gathering is a person who is making a speech or giving a talk.
Definition of 'guest'
guest
(gest)Explore 'guest' in the dictionary
countable noun
A guest is someone who is visiting you or is at an event because you have invited them.