Analogy
A comparison between two items or ideas (usually used as a way to better explain something)
Cognitive
The ability to think
Compelling
Convincing evidence
Comprehension
The extent to which information is understood (or not understood)
Contemplate
To mull something over
Interactivity
A computer's ability to respond to its users' input
Nourishment
Sustenance; food/drink needed for humans to stay alive
Prolong
To make something last longer
Synapse
A junction that lies between two nerve cells
Vital
Essential
