1. contrive, devise, excogitate, forge, formulate, invent

come up with (an idea, plan, explanation, theory, or principle) after a mental effort

Example Sentences:
'excogitate a way to measure the speed of light'

Synonyms

• contrive
• devise
• forge
• formulate
• invent

2. chew over, contemplate, excogitate, meditate, mull, mull over, muse, ponder, reflect, ruminate, speculate, think over

reflect deeply on a subject

Example Sentences:
'I mulled over the events of the afternoon'
'philosophers have speculated on the question of God for thousands of years'
'The scientist must stop to observe and start to excogitate'

Synonyms

• chew over
• contemplate
• meditate
• mull
• mull over
• muse
• ponder
• reflect
• ruminate
• speculate
• think over