As a noun class is

(countable) a group, collection, category or set sharing characteristics or attributes.

As a verb class is

to assign to a class; to classify.

As an adjective class is

(irish|british|slang) great; fabulous.

Oring is likely misspelled.

Oring has no English definition.

As a noun seal

is a pinniped (Pinnipedia), particularly an earless seal (true seal) or eared seal.

As a verb seal

is to hunt seals.

Crirerion is likely misspelled.

Crirerion has no English definition.

As a noun condition is

a logical clause or phrase that a conditional statement uses. The phrase can either be true or false.

As a verb condition is

to subject to the process of acclimation.

Notice is a synonym of poster.

As nouns the difference between poster and notice

is that poster is one who posts a message while notice is the act of observing; perception.

As a verb notice is

to observe or take notice of.

As a noun defacto

is .

As an adverb facto is

(legal) in fact; by the act or fact.

As adjectives the difference between impressable and impressionable

is that impressable is an alternative form of lang=en while impressionable is being easily influenced (especially of young people).

As a noun impressionable is

an impressionable person.

Stupide is likely misspelled.

Stupide has no English definition.

As an adjective naive

is lacking worldly experience, wisdom, or judgement; unsophisticated.

As adjectives the difference between imperceptible and undetectable

is that imperceptible is not perceptible, not detectable, too small in magnitude to be observed while undetectable is unable to be detected; not detectable.

As an adjective undetectable is

unable to be detected; not detectable.

As nouns the difference between pathos and sentiment

is that pathos is the quality or property of anything which touches the feelings or excites emotions and passions, especially that which awakens tender emotions, such as pity, sorrow, and the like; contagious warmth of feeling, action, or expression; pathetic quality while sentiment is a general thought, feeling, or sense.