correction
the act of offering an improvement to replace a mistake; setting right
correct
free from error; especially conforming to fact or truth
explore
travel to or penetrate into
exploration
to travel for the purpose of discovery
admiration
a feeling of delighted approval and liking
subtraction
an arithmetic operation in which the difference between two numbers is calculated
examine
observe, check out, and look over carefully or inspect
examination
the act of examining something closely (as for mistakes)
separate
standing apart; not attached to or supported by anything
separation
the act of dividing or disconnecting
alter
cause to change; make different; cause a transformation
alteration
the act of revising or altering (involving reconsideration and modification)
observation
the act of observing; taking a patient look
reflect
to throw or bend back (from a surface)
reflection
the phenomenon of a propagating wave (light or sound) being thrown back from a surface
substitute
a person or thing that takes or can take the place of another
substitution
the act of putting one thing or person in the place of another: "he sent Smith in for Jones but the substitution came too late to help"
confession
an admission of misdeeds or faults
pollution
undesirable state of the natural environment being contaminated with harmful substances as a consequence of human activities
irritate
cause annoyance in; disturb, especially by minor irritations
irritation
the act of troubling or annoying someone
coordinate
of equal importance, rank, or degree
coordination
the regulation of diverse elements into an integrated and harmonious operation
