The correct usage would be "on the same plane". Plane as in "plate", "table" or "page". These are nouns. "Plain" is an adjective.
yes it is.
No, you mean the word "fare".
No, "sence" is not a word in standard English usage. The correct spelling is "sense."
"Anyway" is the only correct word. "Anyways" is not a genuine word, and therefore its usage is never correct.
a unidimensional
plane, plain, plain
My father didn't give my allowance for this week.
grassland, plain, prairie, savanna
He Emailed him after the work was done to show his progress. This is an example of usage of email word.
The doctor has left the building. There is a sentence using the word "doctor" correctly.
I have a dream. (Noun) I dream of better days. (Verb)
Plain, flatland, tundra...