The best replacement for probably is likely.

The best alternatives to probably are rated as following:
★★★★★  likely
★★★★★  maybe
★★★★  possibly
★★★  probably
★★★  probable
★  prolly
★  most likely
★  properly
★  i probably will
★  perhaps
★  probably would
★  probably will
★  i probably should

Your alternative for probably is not listed? Suggest!


No companions for probably have been suggested so far.
You have in mind a companion for probably and it is not yet here? Propose!



Google Trends

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probably
likely
maybe