Synonyms for Genial:

adj.

bright (adjective)
lively.
cheerful (adjective)
bright, complaisant, optimistic, lighthearted, friendly, sparkling, merry, glad, amiable, sunny, spirited, happy, jaunty, easygoing, cheerful, cheery, agreeable, pleased, pleasant, warm, congenial, cordial, affable, jolly, buoyant, joyful, lively.
extremely nice and happy (adjective)
convivial, good-natured, friendly, pleasant, sunny, neighborly, amiable, congenial, cheery, affable, gentle, amicable, Warm-hearted, hearty, jolly, merry, cordial, agreeable, warm, easygoing, gracious, glad, cheerful, cheering, sociable, kind.
friendly (adjective)
neighborly, warmhearted, genuine, peaceable, welcoming, companionable, Warm-hearted, peaceful, affable, spontaneous.
mild (adjective)
gentle, even, lenient, kind, meek, liberal, forbearing, broad-minded, sweet, benevolent, quiet, benign, soft, tender, charitable, clement, amiable, cordial, lax, moderate, permissive, libertarian, peaceable, tolerant, mild, insipid, peaceful, open-minded.
pert (adjective)
mental.
sociable (adjective)
gabby, amicable, gracious, vivacious, congenial, gregarious, cordial, garrulous, neighborly, convivial, companionable, sociable, talkative, hearty, chatty, hospitable, courteous, amiable, affable, easygoing, friendly, folksy.

n.

cheering, fair. good-natured, attitude, good-tempered, good. genial (noun)
benign, friendly, affable, mental, amiable, kind, benignant, cordial.

Other synonyms:

good-tempered. good-natured. Other relevant words:
good, good-tempered, fair, welcoming, mental, cheering, warmhearted, Warm-hearted, benignant, good-natured.

Usage examples for genial

  1. He was dark, and medium large, and he had a genial way. – The Planet Strappers by Raymond Zinke Gallun
  2. Then he advanced with a genial smile upon his well- cut, handsome face. – Mr. Marx's Secret by E. Phillips Oppenheim
  3. Brother Lawton is a good preacher, has a genial spirit, and is devoted to his work. – Thirty Years in the Itinerancy by Wesson Gage Miller