seroconcordance

Etymology tree
Proto-Indo-European *ser-
Proto-Indo-European *sér-o-der.
Proto-Italic *serom
Latin serumder.
English serum
English sero-
Proto-Indo-European *ḱe?
Proto-Indo-European *ḱóm
Proto-Italic *kom
Old Latin com
Late Latin cum
Proto-Indo-European *ḱerd-
Proto-Indo-European *ḱḗr
Proto-Indo-European *ḱr̥d-
Proto-Italic *kord
Late Latin cor
Late Latin concors
Proto-Indo-European *-h₂
Proto-Indo-European *-éh₂
Proto-Indo-European *-yéti
Proto-Indo-European *-eh₂yéti
Proto-Italic *-āō
Late Latin -ō
Late Latin concordō
Late Latin concordantiader.
Old French concordanceder.
English concordance
English seroconcordance
From sero- + concordance.