Large is an Adjective
Fish is a Noun
Swim is a Verb
Swiftly is an Adverb
In is a preposition
The is a determiner
Sea is a noun.
I hope this helps since you didn't say which word is italicized.
Here are some:
Cathy
Cat
Hat
Hay
For 1 thing they have to consider the time period the play is written in,for another you MUST think of the audience and wether or not they can understand what the dialogue is talking about