THEORIZE Synonyms: 69 Similar and Opposite Words

theorize

verb

as in to speculate

to think of or suggest ideas about what is possibly true or real; to form or suggest a theory about something Many scientists have theorized about the possibility of life on other planets.

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Recent Examples of theorize Although Jordan didn't have good relations with the Assad regime, O'Brien theorized that one of the Syrian refugees the country hosted might know something about Tice. —

Jennifer Jacobs, CBS News, 1 June 2026 Scientists theorize that exposing flowering tomato plants to temperatures below 50°F damages the flowers. —

Megan Hughes, Better Homes & Gardens, 31 May 2026 Iranian scientists theorized that the other advanced civilizations in our galaxy may have already died out. —

Wyatt Williams, Harpers Magazine, 26 May 2026 The vantage in this piece was earned in those rooms, not theorized from outside them. —

Vibhas Ratanjee, Forbes.com, 23 May 2026 See All Example Sentences for theorize

Recent Examples of Synonyms for theorize

speculate

Verb

The federation president also speculated that the US might try to interfere with the team’s entry to the country while appearing to link Washington’s decision-making to the ongoing war.

— Billy Stockwell, CNN Money, 7 June 2026
Since glaciers didn’t flow right into Salisbury, the study speculates the stone, thought to have served as an altar, was deposited hundreds of miles east, beneath what is now the North Sea.

— Devorah Lauter, ARTnews.com, 4 June 2026