ramp
The inclined plane is a simple machine.
spad
ramp
Inclined plane.
Ramp.
The inclined plane ran over a person lol not reallly but it did fly over the person;)
An inclined plane
I have always been inclined to headaches after long plane rides.
Taciturn.
A four letter word starting with the letter a is able.
It depends on what you mean by 'four letter word'. Thea has four letters, so yes it is. It is not a swear word, so it's not that kind of 'four letter word'.
A four letter word for 'in addition to' is also.