As nouns the difference between particle and participle

is that particle is a very small piece of matter, a fragment; especially, the smallest possible part of something while participle is a form of a verb that may function as an adjective or noun. English has two types of participles: the present participle and the past participle.

As nouns the difference between goiter and growth

is that goiter is while growth is an increase in size, number, value, or strength.

As an adjective additional

is supplemental or added to something.

As a noun additional

is something added.

As a verb upsell is

to persuade a customer to buy more than he or she had intended.

As verbs the difference between admitted and accredited

is that admitted is (admit) while accredited is (accredit).

As an adjective accredited is

given official approval after meeting certain standards, as an accredited university; or as disease free cattle.

As nouns the difference between rancour and ranker

is that rancour is while ranker is .

In rare|lang=en terms the difference between crab and apple

is that crab is (rare) to back out of something while apple is (rare).

As a noun crab

is a crustacean of the infraorder brachyura, having five pairs of legs, the foremost of which are in the form of claws, and a carapace or crab can be the crab apple or wild apple or crab can be the tree species , native of south america or crab can be short for carabiner.

As a verb crab

is to fish for crabs or crab can be (obsolete) to irritate, make surly or sour.

As a proper noun apple is

a nickname for new york city, usually “the big apple”.

As nouns the difference between lounge and waiting

is that lounge is a waiting room in an office, airport etc while waiting is watching.

As verbs the difference between lounge and waiting

is that lounge is to relax; to spend time lazily; to stand, sit, or recline, in an indolent manner while waiting is present participle of lang=en.

As adjectives the difference between acerbic and cruel

is that acerbic is tasting sour or bitter while cruel is not nice; mean; heartless.

As a verb cruel is

to spoil or ruin (one's chance of success.

As verbs the difference between planing and organizing

is that planing is while organizing is .

As nouns the difference between planing and organizing

is that planing is the act by which something is planed while organizing is the act of rearranging elements following one or more rules.

As nouns the difference between certainty and know

is that certainty is the state of being certain while know is knowledge; the state of knowing.

As a verb know is

(lb) to perceive the truth or factuality of; to be certain of or that.