Words to Describe observers

How observers often is described ("________ observers")

• scientific
• attentive
• intelligent
• forward
• most
• various
• superficial
• naive
• official
• many
• untrained
• passive
• close
• western
• several
• political
• careful
• century
• acute
• sympathetic
• foreign
• competent
• experienced
• contemporary
• outside
• soviet
• astute
• few
• reliable
• impartial
• sensitive
• dispassionate
• british
• objective
• accurate
• casual
• knowledgeable
• american
• expert
• keen
• sophisticated
• critical
• careless
• perceptive
• skilled
• european
• shrewd
• military
• trained
• international
• detached
• earliest
• numerous
• independent
• different
• thoughtful
• disinterested
• academic
• subsequent
• other
• strict
• informed
• earlier
• cynical
• external
• neutral
• interested