It really does depend on how you use it, but most of the time it is an abstract noun: 'It could have been anything'
No part of grammar
The word grammar is a noun.
Spelling is not officially a part of grammar.
The correct grammar is "You didn't have to send us anything." Using "nothing" is a double negative and is considered grammatically incorrect.
I is watch monitor.
"Of" is a preposition.
linking verb
connectives
Grammar
linking verb
anything with right spelling and grammar.
No, he did not have a part in The Grinch.