wiki

As a proper noun wiki

is (proscribed) wikipedia.

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.

As a proper noun wiki

is (proscribed) wikipedia.

As a noun achievement is

the act of achieving or performing; a successful performance; accomplishment.