Synonym for arrogant is "inflated"

aloof [adjective]

means "haughty"
arrogant, conceited, disdainful, proud, unapproachable

authoritative [adjective]

means "authoritarian"
commanding, impressive, imperious, masterful, dictatorial, arrogant

autocratic [adjective]

means "bigoted"
domineering, repressive, overbearing, arrogant, dogmatic, peremptory

big [adjective]

means "property"
fat-headed, inflated, arrogant, pretentious, boastful, self-important

bloated [adjective]

means "pompous"
self-important, arrogant, stuffy, important, magisterial

boastful [adjective]

means "fat-headed"
inflated, arrogant, pretentious, big, self-important, conceited

bombastic [adjective]

means "fat-headed"
inflated, arrogant, pretentious, boastful, self-important, conceited

cavalier [verb]

means "haughty"
arrogant, disdainful, supercilious, lofty

- conjugate verb cavalier

contemptuous [adjective]

means "condescending"
pompous, derisive, arrogant, disrespectful, opprobrious, haughty

disdainful [adjective]

means "haughty"
arrogant, cavalier, supercilious, lofty

dogmatic [adjective]

means "dictatorial"
bigoted, egotistical, stubborn, opinionated, overbearing, arrogant

egoistic [adjective]

means "selfish"
egotistic, conceited, arrogant, self-centred, egocentric

egotistical [adjective]

means "dictatorial"
bigoted, dogmatic, stubborn, opinionated, overbearing, arrogant

haughty [adjective]

means "cavalier"
arrogant, disdainful, supercilious, lofty

high [adjective]

means "character trait"
haughty, arrogant, supercilious, snobbish, lofty, proud

imperious [adjective]

means "domineering"
overbearing, tyrannical, despotic, dictatorial, bossy, arrogant

impertinent [adjective]

means "rude"
impolite, insolent, discourteous, arrogant, brazen, impudent

impolite [adjective]

means "rude"
impertinent, insolent, discourteous, arrogant, brazen, impudent

important [adjective]

means "pompous"
self-important, arrogant, stuffy, bloated, magisterial

insolent [adjective]

means "proud"
arrogant, cavalier, lofty, superior

lofty [adjective]

means "proud"
arrogant, cavalier, immodest, haughty, disdainful

masterful [adjective]

means "authoritarian"
commanding, impressive, imperious, authoritative, dictatorial, arrogant

pompous [adjective]

means "fat-headed"
inflated, arrogant, pretentious, boastful, self-important, conceited

pretentious [adjective]

means "fat-headed"
inflated, arrogant, big, boastful, self-important, conceited

proud [adjective]

means "character trait"
egotistical, conceited, contented, self-satisfied, vain, arrogant

repressive [adjective]

means "bigoted"
domineering, autocratic, overbearing, arrogant, dogmatic, peremptory

self-important [adjective]

means "fat-headed"
inflated, arrogant, pretentious, boastful, big, conceited

stand-offish [adjective]

means "aloof"
cold, detached, arrogant, indifferent, callous, unfriendly

standoffish [adjective]