Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
...
English rare
Old English gǣsne (cognate)
Old English selden (cognate)
Old English seldsēne (cognate)
Old English hrēr (inherited)
Old English hrēre (mention)
Old English hrēran (mention)
Old English hrōr (cognate)
English seldsome (mention)
English rare bird (link)
English rare earth mineral (link)
English rarity (link)
English rear (mention)
English rear (link)
English reer (alter)
English rere (alter)
English (alter)
English UK (alter)
English medium rare (link)
English rear (mention)
English rather (mention)
English rath (mention)
Middle English rare (inherited)
Middle English gesen (cognate)
Middle English seld (cognate)
Middle English seldscene (cognate)
Middle English rere (inherited)
Old French rare (derived)
Old French rere (mention)
Proto-Germanic *hrōzijaną (derived)
Proto-Indo-European *er(e)- (derived)
Proto-Indo-European *rē- (mention)
Proto-Indo-European *ḱroHs- (derived)
Latin rārus (derived)

English child (alter)
English brake (alter)
English frequent (link)
English rarefy (suffix)
English rear (link)
English rear (link)
English rarely (suffix)
English Adams (alter)
English rarity (suffix)
English rarity (mention)
English rareness (suffix)
English raring (mention)
English raree show (mention)
English ultrarare (prefix)
English rarify (suffix)
English semirare (prefix)
English rareish (suffix)
English unfrequent (link)
English nonrare (prefix)
English raresome (suffix)
English rarepair (compound)
English superrare (prefix)
Middle English rere (link)
Japanese 珍しい (mention)
Japanese レア (borrowed)
Dutch raar (cognate)
Sanskrit ऋते (cognate)