Ones that sound pretty or look pretty (example: the British spelling of enamored > the US spelling).

• accoutrements
• acumen
• addendum
• appeal
• auspicious
• blatant
• cacophony
• circumnavigate
• clandestine
• coalesce
• cocksure
• corrosive
• coruscate
• crescendo
• culminate
• delineate
• deuteragonist
• deviate
• disavow
• disenfranchise
• disengaged
• disingenuous
• doubtless
• ebullient
• egregious
• enamoured
• ephemera
• epistolary
• epoch
• eviscerate
• evocative
• facetious
• fated
• hopefully
• insidious
• kinetic
• limerence
• listless
• obtuse
• pallid
• pedantic
• perpendicular
• perspicacious
• pristine
• reciprocate
• reticent
• romanticize
• sangfroid
• singe
• sinuous
• solidarity
• somnambulism
• sordid
• swoon
• tepid
• trepidation
• truncate
• velocity
• verisimilitude
• winsome