Synonyms for To begin with:

• adv

  •Other relevant words: (adverb)
  • for openers,
  • first,
  • in the first place,
  • begin with,
  • to start with,
  • start with,
  • in first place,
  • before all else,
  • at the outset.

• adv.

  •first (adverb)
  • beforehand,
  • initially.
  •for openers (adverb)
  • first off.
  •originally (adverb)
  • formerly,
  • primarily,
  • by birth,
  • primitively,
  • by origin,
  • at first,
  • incipiently,
  • basically.
  •Other relevant words: (adverb)
  • for starters.

• n.

  •earlier (noun)
  • earlier.
  •in the beginning (noun)
  • in the beginning.
  •Other relevant words: (noun)
  • originally.

• Other synonyms:

  •
  • lastly,
  • inter alia,
  • whatnot,
  • secondly,
  • thirdly,
  • Et cetera.
  •
  • firstly.
  •
  • second.
  •Other relevant words (noun):
  • before anything else,
  • from the start,
  • at the start,
  • before all.

Antonyms for To begin with:

• adv.

  • first
    finally, last.
  • originally
    secondarily.