Contractor
Part of speech: noun
Definition: A person who executes the building or improving of buildings. A person or company that performs specific tasks like electrical or plumbing work in construction projects. A person or company hired to maintain existing facilities like air conditioning systems, groundskeeping, etc.
Example sentence: I was a general contractor when I was paying for my first record.
Declarer
Part of speech: noun
Definition: The person who wins the bidding and so declares what suit will be trump.One who declares.A statement that declares the properties of a variable or contributes to doing so.