reclining chair vs armchair

reclining chair and armchair both are nouns.

Word	Noun	Adjective	Verb	Adverb
reclining chair	Yes	No	No	No
armchair	Yes	No	No	No

As nouns, armchair is a hypernym of reclining chair; that is, armchair is a word with a broader meaning than reclining chair:

reclining chair: an armchair whose back can be lowered and foot can be raised to allow the sitter to recline in it
armchair: chair with a support on each side for arms

reclining chair (noun)	armchair (noun)
an armchair whose back can be lowered and foot can be raised to allow the sitter to recline in it	chair with a support on each side for arms