This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

v. To place too much emphasis on.

v. To subject to excessive physical or emotional stress.

v. To subject to mechanical force or pressure to the point of deformation.

v. To place excessive emphasis on something

v. To place excessive physical stress on something, especially to such an extent that it deforms or breaks

v. place special or excessive emphasis on

"One of them also failed in the accident, but the report did not specify the cause of the "overstress" on those welds."

overstressed   

overdraw    exaggerate    overstate    magnify    hyperbolise