| original(adjective, material, important, natural, basic) | |
| paramount(important, significant, original, basic, vital) | |
| participial | |
| philological | |
| phonemic | |
| phonetic | |
| phonological | |
| plasmic(adjective, material, natural, basic, living) | |
| postpositional | |
| prepositional | |
| primary(adjective, material, important, natural, basic) | |
| prime(adjective, material, important, natural, basic) | |
| primitive(adjective, material, important, natural, basic) | |
| primordial(important, significant, original, basic, vital) | |
| principal(adjective, material, important, natural, basic) | |
| pronominal | |
| psycholinguistic | |
| radical(important, original, basic, vital, primary) | |
| requisite(important, significant, original, basic, vital) | |
| rudimentary(important, significant, original, basic, vital) |
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| APA | Smart Define. (2015). structural thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/structural/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "structural thesaurus" https://smartdefine.org/structural/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2015, structural thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/structural/thesaurus/synonyms>. |
| MLA | Smart Define. "structural thesaurus" 10 April 2015. Web. 20 September 2026. <https://smartdefine.org/structural/thesaurus/synonyms> |