Synonyms for Sycophantic (same or very similar meaning)
WordNet sense 1 (attempting to win favor from influential people by flattery):
obsequious, bootlicking, fawning, toadyishWordNet sense 2 (lacking sincerity):
insincereWordNet sense 3 (submissive or fawning in attitude or behavior):
servileFrom the ODE community, based on WordNetadd/edit