ruff vs crossruff

ruff is a noun but crossruff is not a noun.

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

As verbs, crossruff is a hyponym of ruff; that is, crossruff is a word with a more specific, narrower meaning than ruff:

Other hyponyms of ruff include overtrump.

ruff (noun)	crossruff (noun)
(card games) the act of taking a trick with a trump when unable to follow suit
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)	crossruff (verb)
play a trump	trump alternately in two hands