Guarani

Ethnography

• Guaraní people, an indigenous people from South America's interior (Brazil, Argentina, Paraguay and Bolivia)
• Guarani language, or Paraguayan Guarani, an official language of Paraguay
• Guarani dialects, spoken in Argentina, Brazil, Bolivia, and Paraguay
• Guarani languages, a group of languages, including Guarani, in the Tupí-Guaraní language subfamily
• Eastern Bolivian Guaraní language, historically called Chiriguanos, living in the eastern Bolivian foothills of the Andes. Also called Ava Guarani.

Economics

• Paraguayan guaraní, the currency of Paraguay

Education

• The Guarini School of Graduate and Advanced Studies, a subunit of Dartmouth College

Geography

• Guarani, Minas Gerais, Brazil
• Guarani de Goiás, Brazil
• Guarani das Missões, Rio Grande do Sul, Brazil
• Guarani Aquifer, a large underground water reservoir in South America

Literature and music

• The Guarani, an 1857 novel by José de Alencar
• Il Guarany, an opera by Carlos Gomes, based on the above novel
• Guarany (film), a 1948 Italian film directed by Riccardo Freda

Machines

• FMA IA 50 Guaraní II, an Argentine utility aircraft
• VBTP-MR Guarani, a Brazilian 6x6 armored personnel carrier

Association football (soccer) clubs

;Brazil

• Guarani Esporte Clube (CE), Juazeiro do Norte
• Guarani Esporte Clube (MG), Divinópolis
• Guarani FC, Campinas
• Guarany Futebol Clube, Bagé
• Guarany Futebol Clube (Camaquã)
• Guarany Sporting Club, Sobral
• Associação Atlética Guarany, Porto da Folha
• Esporte Clube Guarani, Venâncio Aires
• Sociedade Esportiva, Recreativa e Cultural Guarani, Palhoça
• Sport Club Guarany, Cruz Alta

;Paraguay

• Club Guaraní, Asunción
• Guaraní F.B.C., Trinidad

Astronomy

• Guarani, official name of exoplanet HD 23079 b

People

• Horacio Guarany (1925–2017), Argentinian singer & writer