tickweed vs tickseed

tickweed and tickseed both are nouns.

Word	Noun	Adjective	Verb	Adverb
tickweed	Yes	No	No	No
tickseed	Yes	No	No	No

As nouns, tickweed and tickseed are synonyms defined as:

tickweed and tickseed: any of numerous plants of the genus Coreopsis having a profusion of showy usually yellow daisylike flowers over long periods; North and South America

Other synonyms of tickweed include coreopsis, tick-weed.

tickweed (noun)	tickseed (noun)
any of numerous plants of the genus Coreopsis having a profusion of showy usually yellow daisylike flowers over long periods; North and South America	any of numerous plants of the genus Coreopsis having a profusion of showy usually yellow daisylike flowers over long periods; North and South America