fatuous

As adjectives the difference between obtuse and fatuous

is that obtuse is blunt; not sharp while fatuous is obnoxiously stupid, vacantly silly, content in one's foolishness.

As adjectives the difference between flatuous and fatuous

is that flatuous is (obsolete) windy; generating wind while fatuous is obnoxiously stupid, vacantly silly, content in one's foolishness.

As adjectives the difference between fatuous and fetuous

is that fatuous is obnoxiously stupid, vacantly silly, content in one's foolishness while fetuous is neat.

As adjectives the difference between fastuous and fatuous

is that fastuous is (obsolete) proud; haughty; disdainful while fatuous is obnoxiously stupid, vacantly silly, content in one's foolishness.

is likely misspelled.

has no English definition.

As an adjective fatuous

is obnoxiously stupid, vacantly silly, content in one's foolishness.

As adjectives the difference between superficial and fatuous

is that superficial is shallow, lacking substance while fatuous is obnoxiously stupid, vacantly silly, content in one's foolishness.

As a noun superficial

is (chiefly in plural) a surface detail.

As adjectives the difference between fatuous and dull

is that fatuous is obnoxiously stupid, vacantly silly, content in one's foolishness while dull is lacking the ability to cut easily; not sharp.

As a verb dull is

to render dull; to remove or blunt an edge or something that was sharp.

As adjectives the difference between fatuous and absurd

is that fatuous is obnoxiously stupid, vacantly silly, content in one's foolishness while absurd is absurd.

As an adjective fatuous

is obnoxiously stupid, vacantly silly, content in one's foolishness.

As a contraction yabbut is

.

As a noun yabbut is

(slang|derogatory) a fatuous objection of the kind that might begin "yeah, but".