ruff vs neck ruff

ruff and neck ruff both are nouns.

Word	Noun	Adjective	Verb	Adverb
ruff	Yes	No	Yes	No
neck ruff	Yes	No	No	No

As nouns, ruff and neck ruff are synonyms defined as:

Other synonyms of ruff include choker, ruffle.

ruff (noun)	neck ruff (noun)
(card games) the act of taking a trick with a trump when unable to follow suit	a high tight collar
common Eurasian sandpiper; the male has an erectile neck ruff in breeding season
a high tight collar
an external body part consisting of feathers or hair about the neck of a bird or other animal

ruff (verb)	neck ruff (verb)
play a trump