As a noun vein

is .

As a verb course is

.

As nouns the difference between vein and seam

is that vein is a blood vessel that transports blood from the capillaries back to the heart while seam is a folded back and stitched piece of fabric; especially, the stitching that joins two or more pieces of fabric.Wp

As a verb seam is

to put together with a seam.

As nouns the difference between callow and noob

is that callow is a callow young bird while noob is (internet slang|pejorative) a newb or newbie; refers to the idea that someone is new to a game, concept, or idea; implying a lack of experience also, in some areas the word noob can mean someone is obsessed with things.

As an adjective callow

is (obsolete) bald.

As a verb rotate is

to spin, turn, or revolve.

As an adjective rotate is

having the parts spreading out like a wheel; wheel-shaped.

As adjectives the difference between derelict and desert

is that derelict is abandoned, forsake; given up or forsaken by the natural owner or guardian; (of a ship) abandoned at sea, dilapidated, neglected; (of a spacecraft) abandoned in outer space while desert is deserted.

As nouns the difference between derelict and desert

is that derelict is property abandoned by its former owner, especially a ship abandoned at sea while desert is desert.

In obsolete terms the difference between indian and brave

is that indian is eastern; Oriental while brave is having any sort of superiority or excellence.

As adjectives the difference between indian and brave

is that indian is of or relating to India or its people; or (formerly) of the East Indies while brave is strong in the face of fear; courageous.

As nouns the difference between indian and brave

is that indian is a person from India while brave is a Native American warrior.

As a proper noun Indian

is any language spoken by Indians.

As a verb brave is

to encounter with courage and fortitude, to defy.

As adjectives the difference between then and poor

is that then is being so at that time while poor is with little or no possessions or money.

As nouns the difference between then and poor

is that then is that time while poor is (with "the") those who have little or no possessions or money, taken as a group.

As an adverb then

is (label) at that time.

As a conjunction then

is .

As a preposition until

is up to the time of (something happening).

As a conjunction until

is up to the time that (a condition becomes true).

As a verb untie is

to loosen, as something interlaced or knotted; to disengage the parts of.

As adjectives the difference between tart and taut

is that tart is sharp to the taste; acid; sour while taut is tight; under tension, as in a rope or bow string.

As a noun tart

is a type of small open pie, or piece of pastry, containing jelly or conserve; a sort of fruit pie.

As a verb tart

is to practice prostitution.

As nouns the difference between decals and decads

is that decals is plural of decal while decads is plural of lang=en.