For example, are any of these terms correct?
- two hand sword
- two hands sword
- two-hand sword
- two handed sword
- two-handed sword
For example, are any of these terms correct?
The proper term is "two-handed". The ngram below shows that in comparison "two hand" is hardly used.
However, this argument makes abstraction of an important fact pointed out by user Global Charm in the comments: "two hand" has a meaning of its own. Anyway, this fact has little incidence on the present answer.
Whereas "two-handed" means (most often) (A) "conceived to be handled using two hands", "two-hand" means (often enough) (B) "made or performed using optionally two hands rather than one". We have below three typical cases of this use of "two-hand" (two of them are of a well kown sort and all come from written sources).
Nevertheless, this usage is not perfect and this is seen first in the following example where "two-hand" is actually taken as "two-handed" (from Google Books).
It seems possible to deduce now that user Global Charm's objection points to the first ngram being apparently worthless since "two hand" in "two hand sword" should have two meanings. However, this is not so; "two hand" has to modify "sword", and as such can't be explained by meaning "B". This rather evident contention is confirmed by means of an ngram obtained after the addition of the indefinite article: the same curve results (approximately).
This confirms a real misuse of "two hand" (according to the ideal of two existing definitions).
A more general ngram (below), in which the noun can be anything, shows that this usage is the correct one for all nouns.
Please note: This appears to be about weaponry (you used "wielded" in the question). Weaponry has its own domain specific jargon and technical terms.
Generally there are 3 basic categories of melee weapons:
Hand and a half weapons typically are the same size/weight to about 1.5x bigger/heavier than one-handed weapons.
They usually have an extra long handle/grip that allows the wielder to place the second hand on the handle too, to put more power into a blow or cut and/or to better guide the weapon if precision is required.
Depending on context you will have to decide what best describes your weapon. This may depend on how and by who the weapon is used.
E.g. For a hobbit a man-sized one-handed sword will probably serve as a bastard sword or even a two-handed sword. (In the "Lord of the Rings" the hobbits use short swords that are actually knives for men or elves.)
If something is two-handed it may as well mean that two persons are required to use it. Two-handed is also applied to a person without a dominating hand (i.e. a person is neither left-handed or right-handed).
There is also the term ambidextrous which is also applied to both persons and objects — while an ambidexter is always a person, but that latter term is archaic
But there is one more term: bimanual. And this one is applied only to items
(But if anyone is speaking about wielding a sword or a mace, then two-handed is the correct description.)