As verbs the difference between grabbed and caught

is that grabbed is past tense of grab while caught is past tense of catch.

As an adjective caught is

of the method of being out in which the striker hits the ball and a fielder catches it.

As nouns the difference between refraction and aristocracy

is that refraction is the turning or bending of any wave, such as a light or sound wave, when it passes from one medium into another of different optical density while aristocracy is the nobility, or the hereditary ruling class.

As nouns the difference between plankton and aristocracy

is that plankton is plankton while aristocracy is the nobility, or the hereditary ruling class.

As nouns the difference between contact and demographic

is that contact is the act of touching physically; being in close association while demographic is (en) a demographic criterion: a characteristic used to classify people for statistical purposes, such as age, race, or gender.

As a verb contact

is to touch; to come into physical contact with.

As an adjective demographic is

of or pertaining to demography.

As nouns the difference between orbit and aristocracy

is that orbit is orbit (path of one object around another object) while aristocracy is the nobility, or the hereditary ruling class.

As nouns the difference between curtsies and stoop

is that curtsies is while stoop is the staircase and landing or porch leading to the entrance of a residence or stoop can be a stooping (ie bent, see the "verb" section above) position of the body or stoop can be (dialect) a post or pillar, especially a gatepost or a support in a mine or stoop can be a vessel of liquor; a flagon.

As verbs the difference between curtsies and stoop

is that curtsies is (curtsey) while stoop is to bend the upper part of the body forward and downward.

As nouns the difference between hominid and aristocracy

is that hominid is any primate of the family hominidae all the great apes (chimpanzees, gorillas, orangutans and humans) while aristocracy is the nobility, or the hereditary ruling class.

As an adjective hominid

is of the hominidae.

As an adjective skeptical

is having, or expressing doubt; questioning.

As a verb anticipate is

to act before (someone), especially to prevent an action.

As nouns the difference between lion and footstool

is that lion is net, web while footstool is a low stool for supporting the feet while seated.

As a verb lion

is fill.

As nouns the difference between rafter and girder

is that rafter is one of a series of sloped beams that extend from the ridge or hip to the downslope perimeter or eave, designed to support the roof deck and its associated loads while girder is a beam of steel, wood, or reinforced concrete, used as a main horizontal support in a building or structure.

As a verb rafter

is to make (timber, etc.) into rafters.