a part of a sentence that is not the subject or predicate (and can be omitted without making the sentence ungrammatical) such as 'with the red hair' in 'The boy with the red hair fell off his bike'

addition; help

a person, state etc giving help or support to another

something united with another, especially by treaty

secondary (the usual work)

extra; supplementary

a person who helps another (especially as a deputy or as a junior worker)

helper

a person joint with others in work, business or crime

colleague

a person who looks after another person or a place

being present or related

(of adjectives) placed before the noun, as in 'a burnt hamburger'

word that modifies a noun

giving additional help or support

supplementary

secondary or subordinate but from the same source

indirect, secondary

the quality of being convenient or suitable

availability, usefulness; useful thing

the decorations, furniture etc e.g. of a room or the stage of a theatre

household object

a small, particular fact or item

feature, specific aspect

something carefully designed and made for a particular purpose such as an instrument or a small piece of technical equipment

instrument, tool

something fixed in place, especially (pl) built-in cupboards etc which are bought with a building

fitting, appliance

(a sound of) a flapping blow or movement

winged or extended part of an object

a set of toothed wheels working together in a machine, e.g. to connect the engine of a vehicle with the road wheels

equipment

a person who helps

assistant

a faithful supporter, especially one who obeys without question the orders of a leader

follower

a kind of wild animal like a dog

person who allows himself to be used

an army officer below a captain; junior officer in the Navy

assistant

smaller or less important (than others); a person not yet legally of age (under 18 in GB)

insignificant, small

an object used to add beauty or to decorate

decoration

showing (too) much preference, devotion, to one side, cause, group etc; a person committed to a political party, group or cause

interested, factional

modifier

word that modifies a noun

coming after the first; less important or less strong

subordinate; less important

(a person who is) lower in rank or position; to consider or treat (a person, one's own wishes) as less important

lesser, supplementary

(a person, business etc) not as important, high in position etc as the main person, business etc

secondary, helpful

a river flowing into a larger one

secondary; branch