opulent

As a noun taxonomy

is the science or the technique used to make a classification.

As an adjective opulent is

luxuriant, and ostentatiously magnificent.

As an adjective opulent

is luxuriant, and ostentatiously magnificent.

As a noun wealth is

(obsolete) weal; welfare; prosperity; good; well-being; happiness; joy.

As adjectives the difference between austere and opulent

is that austere is grim or severe in manner or appearance while opulent is luxuriant, and ostentatiously magnificent.

As adjectives the difference between abundant and opulent

is that abundant is fully sufficient; found in copious supply; in great quantity; overflowing while opulent is luxuriant, and ostentatiously magnificent.

As adjectives the difference between opulent and inopulent

is that opulent is luxuriant, and ostentatiously magnificent while inopulent is not opulent; not affluent or rich.