meticulous
Meaning: extremely careful with details
Usage: The ornate needlework in the bride’s gown was a product of meticulous handiwork.
scrupulous
Meaning: painstaking, careful
Usage: With scrupulous care, Sam cut a snowflake out of white paper.
fastidious
Meaning: meticulous, demanding, having high and often unattainable standards
Usage: Mark is so fastidious that he is never able to finish a project because it always seems imperfect to him.
deliberate
Meaning: intentional, reflecting careful consideration
Usage: Though Mary was quite upset, her actions to resolve the dispute were deliberate.