recliner vs reclining chair

recliner and reclining chair both are nouns.

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

As nouns, recliner and reclining chair are synonyms defined as:

recliner and reclining chair: an armchair whose back can be lowered and foot can be raised to allow the sitter to recline in it

Other synonyms of recliner include lounger.

recliner (noun)	reclining chair (noun)
an armchair whose back can be lowered and foot can be raised to allow the sitter to recline in it	an armchair whose back can be lowered and foot can be raised to allow the sitter to recline in it