Synonyms of theorize

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.

Related Words

• speculate
• hypothesize
• think
• postulate
• say
• believe
• presume
• suppose
• assume
• dream
• presuppose
• deduce
• infer
• accept
• swallow
• surmise
• gather
• conclude
• suspect
• guess
• premise
• credit
• hypothecate
• conjecture
• judge
• figure
• conceive
• imagine
• perceive
• suspicion
• insist
• contend
• assert
• take
• affirm
• reckon
• allege
• claim
• declare
• fancy
• maintain
• aver
• avow
• profess
• preconceive
• avouch

Dissimilar Words

• doubt
• question
• challenge
• discredit
• disagree (with)
• deny
• wonder (about)
• dispute
• controvert
• disbelieve
• discount
• reject
• distrust
• repudiate
• disavow
• disclaim
• refute
• disprove
• mistrust
• rebut
• disown
• belie
• confute

Example Sentences

Recent Examples of theorize

Based on the crest fossil’s inner vascular canals and exterior texture, the team theorizes that the cranial accessory was likely housed in keratin and brightly colored. —Andrew Paul, Popular Science, 19 Feb. 2026

And some have theorized that being a carrier for cystic fibrosis can defend against severe cholera, although the evidence for this theory is more scant. —Roxanne Khamsi, The Atlantic, 15 Feb. 2026

The study theorized that ticks couldn’t extract enough moisture from the air for extended time under that treshhold. —Alex Kuffner, The Providence Journal, 14 Feb. 2026

Others have theorized that Heathcliff is Black, pointing to Liverpool’s history as a port city central to Britain’s involvement in the transatlantic slave trade. —Natasha O'Neill, Vanity Fair, 13 Feb. 2026