As a noun stem

is (countable).

As a verb impede is

to get in the way of; to hinder.

As nouns the difference between stem and imped

is that stem is (countable) while imped is a creature without feet.

As an adjective imped is

engrafted, eked, implanted; supplemented by imping.

As nouns the difference between carpentry and upholstery

is that carpentry is the trade of cutting and joining timber in order to construct buildings or other structures; woodworking while upholstery is the craft or business of upholstering furniture.

As nouns the difference between monarchy and nepotism

is that monarchy is a government in which sovereignty is embodied within a single, today usually hereditary head of state (whether as a figurehead or as a powerful ruler) while nepotism is the favoring of relatives or personal friends because of their relationship rather than because of their abilities.

As a noun ask

is amplitude shift keying.

As an adjective strict is

strained; drawn close; tight.

As nouns the difference between floatstone and wackestone

is that floatstone is a kind of calcareous rock, more than 10% of which is made up of grains larger than two millimetres, and which is matrix-supported while wackestone is a calcareous rock consisting of more than 10% grains, supported by a lime mud.

As nouns the difference between rudstone and grainstone

is that rudstone is a calcareous rock consisting of coarse limestones supported by grains larger than two millimetres while grainstone is a kind of calcareous rock that lacks mud and is grain-supported.

As verbs the difference between testify and rectify

is that testify is to make a declaration, or give evidence, under oath while rectify is to correct or amend something.

As nouns the difference between bafflestone and bondstone

is that bafflestone is a kind of calcareous rock where organisms have acted as baffles during deposition, reducing the local depositional energy while bondstone is a stone for bonding masonry to a similar backing.

As adjectives the difference between special and luxury

is that special is special while luxury is very expensive.

As a noun luxury is

very wealthy and comfortable surroundings.