“furthermore”

Used to introduce an additional point that strengthens or extends what has just been said.

“The plan was financially sound; moreover, it had the full backing of the board.”

Best for: Works well in formal essays, reports, and professional correspondence.

Used to introduce a supplementary fact or argument that builds upon the previous statement.

“The new policy reduces costs; additionally, it improves employee morale across all departments.”

Best for: Clean and versatile for business writing, journalism, and academic work.

An archaic adverb meaning 'in addition to this' or 'at the same time,' often closing a thought.

“She was learned in the sciences and, withal, a poet of considerable grace.”

Best for: Best reserved for deliberately archaic or highly literary prose to evoke elegance.

Used to indicate that something else is also true or applies in the same manner.

“The first chapter captivates immediately; likewise, the final pages linger long after reading.”

Best for: Punchy and conversational, suits speeches, essays, and persuasive writing.

Immediately following and in consequence of what has been stated; used to link sequential ideas.

“He presented his evidence; thereupon, the room fell into a charged and telling silence.”

Best for: Adds a ceremonial or narrative gravity, ideal for formal speeches or literary fiction.

Layered on top of something already present, implying an additional quality stacked upon another.

“To his natural charm was superadded a fierce and disciplined intelligence.”

Best for: Truly rare; best deployed in dense literary or philosophical prose for striking effect.