self-important (adj.)
- arrogant
- assured
- big
- bombastic
- cocksure
- complacent
- conceited
- confident
- consequential
- considerable
- convinced
- decided
- determined
- double-barreled
- earthshaking
- egotistical
- flatulent
- formal
- gassy
- grand
- grandiloquent
- great
- haughty
- high-powered
- important
- inflated
- magisterial
- major
- material
- momentous
- narcissistic
- overbearing
- overconfident
- overproud
- overweening
- persuaded
- poised
- pompous
- pontifical
- positive
- presumptuous
- proud
- puffy
- reassured
- secure
- self-absorbed
- self-assured
- self-complacent
- self-confident
- self-loving
- self-reliant
- self-respecting
- self-satisfied
- self-seeking
- self-sufficient
- significant
- smug
- snobbish
- snooty
- snotty
- solemn
- stilted
- stuck-up
- stuffy
- substantial
- superior
- sure
- swollen
- tumid
- turgid
- unafraid
- unfaltering
- unhesitating
- unwavering
- vain
- vainglorious
- world-shaking
