(n.) a smaller copy of something, often used to show what the actual thing looks like or will look like after it is built
model
(v.) to move back and forth or from side to side with very short, quick movements
vibrate
(v.) to find where something is
locate
(v.) to watch or listen to someone or something carefully
observe
(adj.) normal or usual; not special
ordinary
(adj.) producing a wanted or intended result
effective
(v.) to find one's way to a place, especially along a planned course or route
navigate
(n.) a thing needed to make something or to do an activity
material
(adj.) exactly the same
identical
(adj.) alike but not exactly the same
similar
(n.) a sound that bounces off a surface and returns to the listener
echo
(v.) to copy the words or actions of someone or something
imitate