Answer:
Three of the oxymorons include
1. Brawling love
2. Heavy lightness
3. Serious vanity
The feud is oxymoronic and could be described as a vicious circle: the Montagues took revenge for what the Capulets did, the Capulets took revenge for that, et cetera.
Step-by-step explanation:
Oxymoron is a figure of speech in which two opposite ideas are joined to create an effect. The common oxymoron phrase is a combination of an adjective proceeded by a noun with contrasting meanings, such as “cruel kindness,” or “living death”. However, the contrasting words/phrases are not always glued together.