madness; madman; enthusiast; freak; junkie
mistake; error; accident; mishap; improper conduct (e.g. between man and woman); indiscretion
misunderstanding; mistaken idea; wrong guess
wildly different (in ability, strength, etc.); on another level; in a different league; of different heights; uneven
mistaking one person for another; (case of) mistaken identity
out-of-place; inappropriate; sticking out like a sore thumb
crossing without meeting (e.g. letters in the post, people on the road); going astray; difference of opinion; misunderstanding; estrangement
great difference; major mistake
wrong (guess or estimate); misdirected; irrelevant; off the point
an order of magnitude higher; off by a digit; in a different league; unbelievable; incomparable; unimaginable
passing each other; missing (meeting) each other; failing to meet; (being at) cross purposes; discrepancy
misunderstanding; misapprehension; false impression; to be mistaken; to have the wrong idea
variation in color (colour); having a different color
cramp; sprain; unreasonableness; absurdity; illogical; unreasonable
crossing without meeting (e.g. letters in the post, people on the road); going astray; difference of opinion; misunderstanding; estrangement
(brother and sister) born of a different mother
difference; disagreement; conflict; clash; discrepancy; inconsistency
mistaken memory; trick of the memory; slip of the memory
difference in social standing; difference in social position
mistaken idea; misunderstanding; wrong impression
imprudence; misbehavior; misbehaviour; misunderstanding
out of one's line; out of one's field
barely miss (meeting someone, catching a train, etc.)
putting (up) in the wrong place; hanging in the wrong place; disagreement; conflict; crossing paths without meeting; missing each other
wrong idea; delusion; indiscretion; false step; misstep
failing to recognize; failing to recognise; mistaking for
off-topic (on an online thread)
misjudgment; misjudgement
half-sibling (by a different father); uterine sibling; maternal half-sibling; half-brother; half-sister
diagonal cross; x-shaped cross
error in judgment; error in judgement
kink in one's neck; sprained neck
barking up the wrong tree; calling at the wrong house
miscalculation; disappointment
parent's cousin; first-cousin once removed
(being in the) wrong category; being wrongly categorized