When we want to express that something is not always a definite implication, we often use the phrase "not necessarily." However, there are several other synonyms that convey a similar meaning. One such phrase is "not inevitably," which implies that something may or may not happen, but it is not a guaranteed outcome. "Not always" is another option that suggests that while something may be true sometimes, it cannot be universally applied. "Not necessarily" can also be replaced with "not inherently," which implies that something is not inherently or naturally true but may still be possible under certain circumstances. Overall, these phrases effectively communicate that a specific outcome is not always a foregone conclusion.