7-letter words starting with OP

7-letter words 37

• opiniona personal belief or judgment that is not founded on proof or certainty
• openingan open or empty space in or between things
• optionsthe right to buy or sell property at an agreed price; the right is purchased and if it is not exercised by a stated date the money is forfeited
• operatedirect or control; projects, businesses, etc.
• opposedbeing in opposition or having an opponent
• opticalof or relating to or involving light or optics
• optimalmost desirable possible under a restriction expressed or implied
• opposesbe against; express opposition to
• optimummost favorable conditions or greatest degree or amount possible under given circumstances
• oppresscome down on or keep down by unjust use of one's authority
• openersthe first event in a series
• opiatesa narcotic drug that contains opium or an opium derivative
• opulentrich and superior in quality
• opossumsmall furry Australian arboreal marsupials having long usually prehensile tails
• opioids
• opacitythe phenomenon of not permitting the passage of electromagnetic radiation
• opposersomeone who offers opposition
• operanthaving influence or producing an effect
• opiningexpress one's opinion openly and without fear or hesitation
• opalinehaving a play of lustrous rainbow colors
• opuntialarge genus of cactuses native to America: prickly pears
• oppidan
• opiated
• operosecharacterized by effort to the point of exhaustion; especially physical effort
• openestaffording unobstructed entrance and exit; not shut or closed
• operanda quantity upon which a mathematical operation is performed
• opacifymake opaque
• opaqued
• opaquernot transmitting or reflecting light or radiant energy; impenetrable to sight
• opaques
• operonsa segment of DNA containing adjacent genes including structural genes and an operator gene and a regulatory gene
• ophites
• ophitic
• oppugnschallenge the accuracy, probity, or propriety of
• opsonic
• opsoninan antibody in blood serum that attaches to invading microorganisms and other antigens to make them more susceptible to the action of phagocytes
• optimes