As adjectives the difference between unending and unrelenting

is that unending is not ending; having no end while unrelenting is not relenting; having no pity; not being or becoming lenient, mild, gentle, or merciful; unyielding; inflexibly rigid; hard; stern; cruel.

As verbs the difference between writh and squirm

is that writh is while squirm is to twist one’s body with snakelike motions.

As a noun squirm is

a twisting, snakelike movement of the body.

As a noun silo

is silo.

As a proper noun hopper is

.

In obsolete terms the difference between therefor and hence

is that therefor is therefore, for that or this reason or cause while hence is to send away.

As a verb hence is

to send away.

As nouns the difference between rectorate and presidency

is that rectorate is the office of a rector while presidency is the office or role of president.

As adjectives the difference between efficient and economical

is that efficient is making good, thorough, or careful use of resources; not consuming extra. Especially, making good use of time or energy while economical is careful with money so as not to spend too much; prudent; thrifty.

As an adjective recreational

is used for recreation, for fun or pleasure.

As a noun entertainment is

an activity designed to give pleasure, enjoyment, diversion, amusement, or relaxation to an audience, no matter whether the audience participates passively as in watching opera or a movie, or actively as in games.

As nouns the difference between sailboat and airplanes

is that sailboat is a boat propelled by sails while airplanes is .

As nouns the difference between sailboats and airplanes

is that sailboats is while airplanes is .

As nouns the difference between hay and horse

is that hay is (uncountable) grass cut and dried for use as animal fodder or hay can be the name of the letter for the h sound in pitman shorthand while horse is a poker variant consisting of five different poker variants, with the rules changing from one variant to the next after every hand or horse can be (variant of basketball).

As a verb hay

is to cut grasses or herb plants for use as animal fodder.