When hamlet refers to ophelia as a nymph, this is an example of

Allusion

Explanation:

When Hamlet refers to Ophelia as a nymph, this is an example of an allusion. And allusion is an indirect reference to an object, place, person or idea that belongs to a different context. Usually, the author references this indirectly and it is up to the reader to make the connection. In this case, the reference is to the mythological figure of the nymphs.

in other words

to put it differently

for one thing

as an illustration

in this case

for this reason

to put it another way

that is to say

with attention to

by all means

important to realize

another key point

first thing to remember

most compelling evidence

must be remembered

point often overlooked

to point out

on the positive side

on the negative side

with this in mind

notably

including

like

to be sure

namely

chiefly

truly

indeed

certainly

surely

markedly

such as

especially

explicitly

specifically

expressly

surprisingly

frequently

significantly

particularly

in fact

in general

in particular

in detail

for example

for instance

to demonstrate

to emphasize

to repeat

to clarify

to explain

to enumerate