prudish

As a noun decorum

is decorum.

As an adjective prudish is

of excessive propriety; easily offended or shocked, especially by sexual matters.

As adjectives the difference between prudish and humble

is that prudish is of excessive propriety; easily offended or shocked, especially by sexual matters while humble is near the ground; not high or lofty; not pretentious or magnificent; unpretending; unassuming; as, a humble cottage or humble can be hornless.

As a verb humble is

to bring low; to reduce the power, independence, or exaltation of; to lower; to abase; to humiliate.

As adjectives the difference between hidebound and prudish

is that hidebound is bound with the hide of an animal while prudish is of excessive propriety; easily offended or shocked, especially by sexual matters.

As adjectives the difference between pious and prudish

is that pious is of or pertaining to piety, exhibiting piety, devout, godfearing while prudish is of excessive propriety; easily offended or shocked, especially by sexual matters.

As adjectives the difference between upright and prudish

is that upright is vertical; erect while prudish is of excessive propriety; easily offended or shocked, especially by sexual matters.

As an adverb upright

is in or into an upright position.

As a noun upright

is any vertical part of a structure, especially one of the goal posts in sports.

Prudish is a related term of ceremonious.

As adjectives the difference between prudish and ceremonious

is that prudish is of excessive propriety; easily offended or shocked, especially by sexual matters while ceremonious is fond of ceremony, ritual or strict etiquette; punctilious.

Prudish is a related term of stiff.

As adjectives the difference between prudish and stiff

is that prudish is of excessive propriety; easily offended or shocked, especially by sexual matters while stiff is of an object, rigid, hard to bend, inflexible.

As a noun stiff is

an average person, usually male, of no particular distinction, skill, or education, often a working stiff''''' or ''lucky '''stiff .

As a verb stiff is

to fail to pay that which one owes (implicitly or explicitly) to another, especially by departing hastily.

As adjectives the difference between arrogant and prudish

is that arrogant is having excessive pride in oneself, often with contempt for others while prudish is of excessive propriety; easily offended or shocked, especially by sexual matters.

As adjectives the difference between prudish and changeable

is that prudish is of excessive propriety; easily offended or shocked, especially by sexual matters while changeable is capable of being changed.

Diffident is a related term of prudish.

As adjectives the difference between diffident and prudish

is that diffident is (archaic): lacking confidence in others; distrustful while prudish is of excessive propriety; easily offended or shocked, especially by sexual matters.