both; both sides; both parties
interest (on a loan, deposit, etc.)
(my) wife; inside the home; one's family
error; mistake; slip; bug
snare; trap (for catching wild game, etc.); trap (i.e. ruse, subterfuge, etc.)
right side; right-hand side
these days; nowadays; now; at present; recently; lately
where ... is concerned; when it becomes; if it becomes
character (esp. kanji); letter; handwriting; penmanship; the ... word (e.g. "the L word" = "love")
space; interval; space character; whitespace
end; tip; end (of the year, month, etc.); close; youngest child; descendants; offspring
average; medium; mid-grade (item); regular grade; same level as; equal to
naturally; in due course; by itself; of its own accord
process; procedure; sequence; protocol; instruction
if you do this; if this is the case
equality; uniformity; evenness
difficult problem; challenge
establishing; proving; ascertaining; identifying; confirming
to advise strongly; to insist (on something)
to rearrange; to reorder; to move around; to sort; to collate
in some way or other; one way or another; somehow; only just; barely
number of characters; number of letters
(one's) initials; first letter (of a name, sentence, etc.); initial; first
combination; assortment; matching (in a contest); pairing; combination
round robin; having no losing tickets (of a lottery); brute force (in cryptography); using all combinations
(divine) revelation; divine oracle
basis; foundation; grounds; authority
idea; plan; fancy; impulse; thought; whim
flair; flash; insight; flash (of inspiration, wit, etc.); waving (e.g. of a flag in the wind)
to replace; to substitute; to shift; to change places
operation; functioning; running
response (felt in the hands); resistance; reaction; response; effect
to accomplish; to finish; to carry through; to follow through
to look away; to turn away
beginning; start; outset; at first; at the beginning; initially
to take a long hard look at; to look (someone) full in the face