2. facilities equipment, dexterity, ease, amenities
is a countable noun, often in the plural form. facilities refers to all the amenities provided for a particular activity or purpose, including equipment, buildings, services, etc.
production facilities
facilities for study
facilities for travel
sports facilities
device
devices
this can be either a device or a design.
This can be either abstract or concrete, for example:
They use television advertising as a device for stimulating demand.
Her illness is merely a device to avoid seeing him.
Her illness is merely a gimmick to avoid seeing him.
The device had undergone extensive testing.
This device has undergone extensive testing.
3. spin means "to rotate continuously" and revolve means "to turn and rotate around" (interchangeable with rotate) e.g. the earth revolves around the sun
4. tend /vi: easy, inclined, often; generalizing the tendency to do something, or the tendency to tend to a certain condition.
She tends to get angry if you annoy her. Implies a general direction of change and development that has neither a definite course nor a chosen goal, but is subject to change or fluctuation by some external force.
Young women are always interested in the trend of fashion. There is a trend towards simpler styles in women's dress.
And be inclined to probably means that the inclination is character-driven or something you feel subjectively. It's very similar to tend to.
As in He was inclined to be moody.
He tended to be moody.