| prototype(noun, original, example, precursor) |
| root(noun, support, action, cause, reason) |
| antecedents(noun, old, past, foretime) |
| basis(noun, action, cause, reason, object) |
| leading(noun, adjective, head, beginning, original) |
| occasion(noun, cause, start, reason, object) |
| source(noun, support, action, cause, point) |
| factor(noun, feature, influence, reason, issue) |
| foregoer(noun, sign, indication, origin, descent) |
| harbinger(noun, precursor) |
| introductory(adjective, head, beginning, original, prime) |
| pioneer(noun, adjective, head, beginning, original) |
| prevenient |
| advance(verb, adjective, precede, before) |
| antecessor(noun, sign, original, origin, descent) |
| ascendent |
| avant-garde(noun, prelude, precursor) |
| beginning(noun, adjective, cause, reason, base) |
| first(adjective, order, original, old, primary) |
| initial(adjective, head, beginning, original, prime) |