observant

adjectives

paying close attention especially to details
is derived from
is derived from
is similar to
(often followed by `to') giving care or attention
"attentive to details"; "the nurse was attentive to her patient"; "an attentive suitor"
quick to notice; showing quick and keen perception
is derived from
(of individuals) adhering strictly to laws and rules and customs
"law-abiding citizens"; "observant of the speed limit"
is derived from
is derived from