The phrase "was warpath" can be substituted with a variety of different words and phrases. It can be replaced with "on edge," meaning someone is nervous or anxious. It can also be substituted with "in a fury," suggesting someone is extremely angry or exasperated. "In a rage" and "incensed" also convey a sense of intense anger. Other options include "hostile," "belligerent," and "confrontational," implying someone is ready to fight or argue. "Agitated" and "excitable" are more subtle synonyms, indicating someone is easily worked up or prone to emotional outbursts. Ultimately, the relative intensity of "was warpath" will determine which substitute is most appropriate.