first; foremost; most important; best; greatest; above all
step; stair; grade; rank; counter for breaks in written language (or speech, etc.); dan
all; whole; entire; complete (set); in total
ignition; lighting; firing; setting off
connection; attachment; changing trains; conjunction
to detach; to decapitate; to cut loose; to let loose; to dismember
preparation; arrangements; getting ready; provision; setup; reserving
change; variation; variety; diversity; inflection; declension
component; factor; item (e.g. in list); element (e.g. in array); member (e.g. data structure)
separation; partition; detachment; segregation; isolation
fitting (electrical equipment); wiring
system; lineage; corollary; system (range of strata that correspond to a particular time period); (taxonomical) series
check; plaid; checking; monitoring; check (banking); cheque
strangeness; abnormality; disorder
auto; automobile; automatic; oat; oats
prefix for forming ordinal numbers
pressure; stress; pressure (e.g. political); coercion; arm-twisting
speech; tongue; dialect; brogue; bento; Japanese box lunch; petal
closing; closure; shutdown; lockout
reconfirmation; double check
action; conduct; behaviour; behavior; mobilization; mobilisation
unit; (musical) group; band
opening (a door, window, etc.); leaving open; opening up (e.g. to the public); allowing (public) access
disposal; abandonment; scrapping; annulment; cancellation; abrogation
rolling over; turning over; turning around (the other way); reversal (of direction, course, etc.); producing a positive from a negative (photography); producing a negative from a positive
turning round (a ship); changing course; veering
descent; fall; drop; passing down (of an order, decree, etc.)
measurement error; calculation error
amendment; correction; revision; modification; alteration; retouching
recalculation; recalculate
reaffirmation; reconfirmation; revalidation
numeral; figure; digit; numeric character
everything; all; the whole; entirely; completely; wholly
course correction; trajectory change; orbital adjustment