6
preeminent(adjective, bad, tough, top, excellent)
6
preferably(adverb, preference, rather, sooner)
6
preliminary(adjective, beginning, opening, original, basic)
6
sooner(adverb, rather, willingly, preferably)
6
starting time(noun, expression, idiom)
5
number one(noun, verb, expression, adjective, phrasal verb)
5
advance(adjective, time, forward, ahead)
5
excellent(adjective, good, time, quality, great)
5
first-class(adjective, good, quality, bad, great)
5
forward(adjective, adverb, time, lead, beginning)
5
headmost(adjective, order, top, lead, important)
5
lead(verb, adjective, top, excellent, fine)
5
low gear(noun, expression, idiom)
5
offset
5
older(adjective, rank, post, status, age)
5
oldest(adjective, aged, senior, eldest)
5
originally
5
preparatory(adjective, beginning)
5
previous(past, advanced, forward, primary, up)
5
primarily
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APASmart Define. (2016). first thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/first/thesaurus/synonyms
ChicagoSmart Define. 2016. "first thesaurus" https://smartdefine.org/first/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2016, first thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/first/thesaurus/synonyms>.
MLASmart Define. "first thesaurus" 31 March 2016. Web. 20 September 2026. <https://smartdefine.org/first/thesaurus/synonyms>