Are they a twitterer Twitterer Twitter user tweeter tweep? Is it just a matter of preference? For comparison, I think "Facebook user" is the accepted term.
Accurate British English term for an oblong deck from shore out into a lake where you tie your rowing boat
This is a typical image of the structure in question: There are also some variations, shown in this Google image search. But I'm after the often not very wide, some 20-30 feet long wood ...
I can understand why Monday is an abstract noun (it isn't something we can perceive with any of our 5 senses), But is Monday considered a proper noun or a common noun?