Tenably is an adverb that means something is capable of being defended or justified. Other synonyms for tenably include plausibly, credibly, convincingly, feasibly, and justifiably. These words are often used interchangeably to express the same idea of being able to support an argument. Plausibly often implies something is believable or reasonable, while credibly refers to something being based on reliable evidence or sources. Convincingly suggests that something is persuasive or compelling, while feasibly implies that something is achievable or workable. Justifiably denotes that something is defensible or morally sound. Overall, using these synonyms for tenably can help to clarify and strengthen your arguments in writing and speech.