15 entries under cause topic. ×

11
germinal(adjective, beginning, original, promising)
9
primordial(adjective, beginning, first, young)
8
primitive(adjective, simple, beginning, basic)
7
aboriginal(adjective, beginning, authentic, first)
7
original(adjective, beginning, opening, first)
5
embryotic
5
primary(adjective, simple, original, basic)
3
in embryo(expression, idiom)
3
seminal
2
in ovo(expression, idiom)
2
radical
1
causal
1
caused
1
connate
0
protogenal
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APASmart Define. (2015). embryonic thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/embryonic/thesaurus/synonyms
ChicagoSmart Define. 2015. "embryonic thesaurus" https://smartdefine.org/embryonic/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, embryonic thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/embryonic/thesaurus/synonyms>.
MLASmart Define. "embryonic thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/embryonic/thesaurus/synonyms>