hyponym
Concise Oxford English Dictionary © 2008 Oxford University Press:
hyponym /ˈhʌɪpə(ʊ)nɪm/
▶noun a word of more specific meaning than a general or superordinate term applicable to it (e.g. spoon is a hyponym of cutlery). Contrasted with hypernym.
– derivatives
hyponymy /hʌɪˈpɒnɪmi/ noun.
hyponymy /hʌɪˈpɒnɪmi/ noun.
'hyponym' also found in these Oxford entries:

