complimentary (adj.)

• adulatory
• appreciative
• approbatory
• bland
• buttery
• charitable
• congratulatory
• costless
• courtly
• eleemosynary
• encomiastic
• eulogistic
• fawning
• flattering
• free
• fulsome
• given
• gratis
• gratuitous
• gratulatory
• gushing
• honeyed
• insincere
• insinuating
• laudatory
• mealymouthed
• obsequious
• oily
• panegyric
• panegyrical
• regardful
• respectful
• slimy
• smarmy
• smooth
• smooth-spoken
• smooth-tongued
• soapy
• sycophantic
• unctuous
• untaxed