Tool.
For example, dental instruments, fire fighting gear, construction equipment, office supplies, art materials
Yes, the word detectors is a noun, the plural of the singular noun detector; a device or instrument designed to recognize the presence of a particular object or substance; a word for a thing.
Another word for "express opposition" is "oppose." Other synonyms include "protest," "contest," or "object." Each of these terms conveys the idea of disagreement or resistance to a particular idea or action.
Relative vector of velocity. "Bearing" is another possibility.
specific
The word 'device' is a noun, a word for a thing made for a particular purpose; something in an artistic work designed to achieve a particular effect.
Propaganda is a word designed to influence opinions by presenting information in a biased or misleading manner to promote a particular agenda or viewpoint.
What is another word for certain? particular
imaginary, pretend
An individual/specific item, object, person, group, etc...
Orbit is the word used to describe the motion of the Earth as it circles another object in space.
morals
A preposition is a word that establishes a relationship between its object and another word in the sentence. It typically indicates location, direction, time, or introduces a particular relationship between elements in a sentence. Common prepositions include "in," "on," "under," "before," and "after."