When it comes to describing someone who is stubborn, there are a plethora of words that can be used to convey the same idea. Some of the synonyms for the phrase "was stubborn" include obstinate, headstrong, intransigent, unyielding, inflexible, resolute, adamant, or unshakable. These words all denote someone who is unwilling to change their opinions or beliefs, regardless of any compelling evidence to the contrary. They may also suggest that the person is difficult to reason with and is not open to compromise or negotiation. Whatever word you choose, it's clear that being stubborn can be both a strength and a weakness, depending on the situation.