34
begin with
6
firstly(adverb, off, immediately, before, ahead)
5
to begin with
3
first of all(expression, adverb, off, immediately, before)
3
foremost(adverb, before)
3
immediately(adverb, time, before)
2
first(adjective, adverb, order)
2
at once
2
first thing(expression, adverb, off, immediately, before)
2
forthwith(adverb, time)
2
in the first place(expression, adverb, off, immediately, before)
2
instanter
2
right away(adverb, time)
2
straight off(adverb, time, directly)
2
straightaway(adverb, time, directly)
2
up front(expression, adverb, off, immediately, before)
1
primo(adverb, original, primary, off, immediately)
1
aboriginal(adjective, head, beginning, opening, original)
1
ahead(adjective, adverb, head, beginning, prime)
1
anon
13 years ago|1.3k views|share |citing 
APASmart Define. (2013). first off thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/first_off/thesaurus/synonyms
ChicagoSmart Define. 2013. "first off thesaurus" https://smartdefine.org/first_off/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2013, first off thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/first_off/thesaurus/synonyms>.
MLASmart Define. "first off thesaurus" 18 May 2013. Web. 22 September 2026. <https://smartdefine.org/first_off/thesaurus/synonyms>