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Synonyms for Blend (same or very similar meaning)

WordNet sense 1 (a new word formed by joining two others and combining their meanings):
portmanteau, portmanteau word

WordNet sense 2 (blend or harmonize):
go, blend in

WordNet sense 3 (combine into one):
intermingle, intermix, immingle

WordNet sense 4 (mix together different elements):
coalesce, combine, commingle, conflate, flux, fuse, meld, merge, mix, immix, combine

WordNet sense 5 (the act of blending components together thoroughly):

From the ODE community, based on WordNetadd/edit