LEEWAY
allowance, leeway, margin, tolerance
(noun) a permissible difference; allowing some freedom to move within limits
leeway
(noun) (of a ship or plane) sideways drift
Source: WordNet® 3.1
Etymology
Noun
leeway (countable and uncountable, plural leeways)
The drift of a ship or airplane in a leeward direction.
A varying degree or amount of freedom or flexibility; margin, latitude, elbowroom.
(British) An adverse discrepancy or variation in a cumulative process, usually in the phrase make up leeway.
Synonyms
• (varying degree or amount of freedom): freedom, flexibility, latitude, wiggle room
Source: Wiktionary
Lee"way`, n. (Naut.)
Definition: The lateral movement of a ship to the leeward of her course;
drift.
Source: Webster’s Unabridged Dictionary 1913 Edition