Greek letters are widely used in mathematics and other fields of science.
α – alpha – æl-fə
β – beta – bee-tə (UK), bei-tə (US)
γ – gamma – gæ-mə
δ – delta – del-tə
ε – epsilon – eps-ill-ən or ep-sigh-lonn (UK), eps-ill-aan (US)
ζ – zeta – zee-tə (UK), in the US more commonly zei-tə
η – eta – ee-tə (UK), in the US more commonly ei-tə
θ – theta – thee-tə or thei-tə (in the US; both with ‘th’ as in think)
ι – iota – I-oh-tə (‘I’ pronounced like ‘eye’)
κ – kappa – kæ-pə
λ – lambda – læm-də
μ – mu – myoo
ν – nu – nyoo
ξ – xi – ksaai (as in sick sigh) or zaai
ο – omicron – oh-my-kronn (UK), aa-mə-kraan or oh-mə-kraan (US)
π – pi – paai (the same as pie)
ρ – rho – roh (rhymes with go)
σ – sigma – sig-mə
τ – tau – taa’u (rhyming with cow) or taw (rhyming with saw)
υ – upsilon – ‘ups’ as oops, ʌps or yoops, ‘ilon’ as ill-on or I’ll-ən
φ – phi – faai (as in identify)
χ – chi – kaai (as in kite)
ψ – psi – psaai (as in top side) or saai (as in side)
ω – omega – oh-meg-ə or oh-mɪg-ə (UK), oh-mey-gə or oh-meg-ə (US)
https://en.wikipedia.org/wiki/Greek_alphabet