fastness

fast·ness  (fstns)

n.

1. The condition or quality of being fast, especially:

a. Firmness; security.

b. Rapidity; swiftness.

2. The quality or condition of color retention; colorfastness.

3.

a. A secure or fortified place; a stronghold.

b. A remote, secret place.

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fastness

Noun

Brit & Austral literary a stronghold or safe place that is hard to get to

Thesaurus

Noun	1.	fastness - a rate (usually rapid) at which something happens; "the project advanced with gratifying speed" swiftness, speed pace, rate - the relative speed of progress or change; "he lived at a fast pace"; "he works at a great rate"; "the pace of events accelerated" haste, hastiness, hurriedness, hurry, precipitation - overly eager speed (and possible carelessness); "he soon regretted his haste" execution speed - (computer science) the speed with which a computational device can execute instructions; measured in MIPS graduality, gradualness - the quality of being gradual or of coming about by gradual stages
	2.	fastness - the quality of being fixed in place as by some firm attachment fixity, fixedness, secureness, fixture immovability, immovableness - not capable of being moved or rearranged lodgement, lodging, lodgment - the state or quality of being lodged or fixed even temporarily; "the lodgment of the balloon in the tree"
	3.	fastness - a strongly fortified defensive structure stronghold citadel, bastion - a stronghold into which people could go for shelter during a battle blockhouse - a stronghold that is reinforced for protection from enemy fire; with apertures for defensive fire defensive structure, defence, defense - a structure used to defend against attack; "the artillery battered down the defenses" hold - a stronghold donjon, dungeon, keep - the main tower within the walls of a medieval castle or fortress redoubt - an entrenched stronghold or refuge