Observers adjectives are listed in this post. Each word below can often be found in front of the noun observers in the same sentence. This reference page can help answer the question what are some adjectives commonly used for describing OBSERVERS.
able, academic, accurate, acute, aerial, american, ancient, astute, attentive, best, better, british, candid, careful, careless, casual, century, certain, chinese, clinical, close, closest, common
competent, conscientious, contemporary, critical, cultural, curious, detached, different, diligent, disinterested, dispassionate, distant, distinguished, earlier, earliest, early, eminent, english, european, exact, excellent, experienced, expert
external, eyed, faithful, few, first, foreign, former, forward, french, future, german, good, great, hasty, human, impartial, independent, indifferent, individual, inexperienced, informed, intelligent, interested
international, japanese, keen, keenest, knowledgeable, later, legal, local, male, many, medical, mere, military, minded, modern, more, most, multiple, neutral, numerous, objective, official, older
only, ordinary, other, outside, passive, patient, perceptive, philosophical, political, prejudiced, previous, professional, qualified, recent, reliable, religious, rigid, sagacious, same, scientific, scrupulous, seasoned, serious
several, shrewd, sighted, silent, skilled, social, strict, subsequent, such, superficial, sympathetic, thoughtful, trained, trustworthy, unbiased, unprejudiced, untrained, various, western, white, wise
Hope this word list had the adjective used with observers you were looking for. Additional describing words / adjectives that describe / adjectives of various nouns can be found in the other pages on this website.