stonechat vs chat

stonechat and chat both are nouns.

Word	Noun	Adjective	Verb	Adverb
stonechat	Yes	No	No	No
chat	Yes	No	Yes	No

As nouns, chat is a hypernym of stonechat; that is, chat is a word with a broader meaning than stonechat:

stonechat: common European chat with black plumage and a reddish-brown breast
chat: songbirds having a chattering call

Other hypernyms of stonechat include Old World chat.

stonechat (noun)	chat (noun)
common European chat with black plumage and a reddish-brown breast	songbirds having a chattering call
	birds having a chattering call
	an informal conversation

stonechat (verb)	chat (verb)
	talk socially without exchanging too much information