- Definitions|2
- Thesaurus|876
- Abbreviations|0
30 entries under opportune topic. ×
| effective(adjective, strong, power, moving, tough) | |
| successful(adjective, happy, useful, helpful, effective) | |
| advantageous(adjective, strong, happy, useful, valuable) | |
| apt(adjective, tough, happy, energetic, active) | |
| auspicious(adjective, strong, happy, positive, fortunate) | |
| convenient(adjective, friendly, happy, sympathetic, useful) | |
| correct(adjective, sound, happy, flawless, fortunate) | |
| favorable(adjective, strong, friendly, happy, useful) | |
| fortunate(adjective, strong, friendly, happy, useful) | |
| just(adjective, good, sound, right, reasonable) | |
| lucky(adjective, strong, happy, positive, beneficial) | |
| providential(adjective, happy, beneficial, fortunate) | |
| right(adjective, good, sound, reasonable, happy) | |
| satisfactory(adjective, sound, happy, flawless, fortunate) | |
| seasonable(adjective, reasonable, happy, sensible, rational) | |
| suitable(adjective, friendly, happy, sympathetic, useful) | |
| timely(adjective, friendly, happy, sympathetic, useful) | |
| accidental(adjective, happy, beneficial, fortunate) | |
| appropriate(adjective, happy, beneficial, fortunate) | |
| befitting(adjective, happy, beneficial, fortunate) |
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| APA | Smart Define. (2015). efficacious thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/efficacious/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "efficacious thesaurus" https://smartdefine.org/efficacious/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, efficacious thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/efficacious/thesaurus/synonyms>. |
| MLA | Smart Define. "efficacious thesaurus" 13 October 2015. Web. 22 September 2026. <https://smartdefine.org/efficacious/thesaurus/synonyms> |