Wikipedia:PEACOCK

There are , but certain expressions should be used with caution, because they may introduce bias. Strive to eliminate expressions that are flattering, disparaging, vague, clichéd, or endorsing of a particular viewpoint.

The advice in this guideline is not limited to the examples provided and should not be applied rigidly. For example, some words have specific technical meanings in some contexts and are acceptable in those contexts (e.g. "claim" in law). What matters is that articles should be well-written and consistent with the core content policies—Neutral point of view, No original research, and Verifiability. The guideline does not apply to quotations, which should be faithfully reproduced from the original sources; see the section on quotations in the main Manual of Style.

Words to watch: ... legendary, great, acclaimed, visionary, outstanding, leading, celebrated, award-winning, landmark, cutting-edge, innovative, extraordinary, brilliant, hit, famous, renowned, remarkable, prestigious, world-class, respected, notable, virtuoso, honorable, awesome, unique ...

Articles suffering from such language should be rewritten to correct the problem or may be tagged with an appropriate template if an editor is unsure how best to correct them.

Puffery is an example of positively loaded language; negatively loaded language should be avoided just as much. People responsible for "public spending" (the neutral term) can be loaded both ways, as "the tax-and-spend politicians borrowing off the backs of our grandchildren" or "the public servants ensuring crucial investment in our essential infrastructure for the public good".

Words to watch: ... cult, racist, perverted, sect, fundamentalist, heretic, extremist, denialist, terrorist, freedom fighter, bigot, myth, -gate, pseudo-, controversial, ...

Value-laden labels—such as calling an organization a cult, an individual a racist, terrorist, or freedom fighter, or a sexual practice a perversion—may express contentious opinion and are best avoided unless widely used by reliable sources to describe the subject, in which case use in-text attribution. Avoid myth in its informal sense, and establish the scholarly context for any formal use of the term.

...
Wikipedia