equivalent

having the same value, purpose, job etc as a person or thing of a different kind

nuance

a very slight, hardly noticeable difference in manner, colour, meaning etc

identical

exactly the same, or very similar

identical to /with

ex. Nutritionally, infant formulas are almost identical to breast milk.

The ingredients are identical with those of competing products.

identical in

ex. The sisters were identical in appearance and character.

conversely

used when one situation is the opposite of another

ex. American consumers prefer white eggs; conversely, British buyers like brown eggs.