Begin
Start up
Start up verb - Get off the ground.
Begin and start up are semantically related in bring into being topic. You can use "Begin" instead a verb "Start up", if it concerns topics such as start the operation of.
Mutual synonyms
Both terms in one sentence
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A further mutation of this occurs when she and the man in question begin to start up a friendship, which looks to be very quickly heading for romantic territory when Emma tells him she's always wanted a silk handkerchief for her own.
Source: Returning the Handkerchief -
Tomodachi Life: Every day when starting up a save file, three pairs of Miis will instantly begin brawling each other out of no context or reason, and these, along with any other fights that start up during the day, can never be prevented.
Source: You Can't Thwart Stage One
Cite this Source
Start up and Begin. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/begin/start_up
Begin & Start up. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/begin/start_up>.
Start up or Begin. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/begin/start_up.
Google Ngram Viewer shows how "begin" and "start up" have occurred on timeline