As nouns the difference between prepare and ethane

is that prepare is preparation while ethane is an aliphatic hydrocarbon, C₂H₆, gaseous at normal temperatures and pressures, being a constituent of natural gas.

As a verb prepare

is to make ready for a specific future purpose; to set up; to assemble.

As nouns the difference between procession and demonstration

is that procession is the act of progressing or proceeding while demonstration is the act of demonstrating; showing or explaining something.

As a verb procession

is to take part in a procession.

As nouns the difference between calendar and menology

is that calendar is any system by which time is divided into days, weeks, months, and years while menology is an alternative spelling of Menologium|lang=en.

As a verb calendar

is to set a date for a proceeding in court, usually done by a judge at a calendar call.

In lang=en terms the difference between fore and pre

is that fore is an exclamation yelled to inform players a ball is moving in their direction while pre is to precum, to pre-ejaculate.

As an adjective fore

is former; occurring earlier (in some order); previous.

As an interjection fore

is an exclamation yelled to inform players a ball is moving in their direction.

As an adverb fore

is in the part that precedes or goes first; opposed to aft, after, back, behind, etc.

As a proper noun Fore

is a people of Papua New Guinea.

As a preposition pre is

before (something significant).

As nouns the difference between coordinator and contactor

is that coordinator is one who coordinates while contactor is a relay used to control an electrical power circuit.

As nouns the difference between preliminary and onset

is that preliminary is a preparation for a main matter; an introduction while onset is a rushing or setting upon; an attack; an assault; a storming; especially, the assault of an army.

As an adjective preliminary

is in preparation for the main matter; initial, introductory, preparatory.

As a verb onset is

(obsolete) to assault; to set upon.

As nouns the difference between checking and evaluation

is that checking is the act of physically keeping an opposing player in check while evaluation is an assessment, such as an annual personnel performance review used as the basis for a salary increase or bonus, or a summary of a particular situation.

As a verb checking

is present participle of lang=en.

As an adjective jovial

is (obsolete) pertaining to jove or zeus; jovian.

As a proper noun joy is

.

As nouns the difference between elders and elderly

is that elders is while elderly is an elderly person.

As an adjective elderly is

old; having lived for relatively many years.

As nouns the difference between floatation and flow

is that floatation is while flow is a movement in people or things with a particular way in large numbers or amounts.

As a verb flow is

to move as a fluid from one position to another.