Antonyms of adj grassroots

2 senses of grassroots

Sense 1
grassroots -- (fundamental; "the grassroots factor in making the decision")

INDIRECT (VIA basic) -> incidental, incident -- ((sometimes followed by `to') minor or casual or subordinate in significance or nature or occurring as a chance concomitant or consequence; "incidental expenses"; "the road will bring other incidental advantages"; "extra duties incidental to the job"; "labor problems incidental to a rapid expansion"; "confusion incidental to a quick change")

Sense 2
grassroots -- (of or involving the common people as constituting a fundamental political and economic group; "a grassroots movement for nuclear disarmament")

INDIRECT (VIA common) -> uncommon -- (not common or ordinarily encountered; unusually great in amount or remarkable in character or kind; "uncommon birds"; "frost and floods are uncommon during these months"; "doing an uncommon amount of business"; "an uncommon liking for money"; "he owed his greatest debt to his mother's uncommon character and ability")

Similarity of adj grassroots

2 senses of grassroots

Sense 1
grassroots -- (fundamental; "the grassroots factor in making the decision")
       => basic (vs. incidental) -- (pertaining to or constituting a base or basis; "a basic fact"; "the basic ingredients"; "basic changes in public opinion occur because of changes in priorities")

Sense 2
grassroots -- (of or involving the common people as constituting a fundamental political and economic group; "a grassroots movement for nuclear disarmament")
       => common (vs. uncommon) -- (having no special distinction or quality; widely known or commonly encountered; average or ordinary or usual; "the common man"; "a common sailor"; "the common cold"; "a common nuisance"; "followed common procedure"; "it is common knowledge that she lives alone"; "the common housefly"; "a common brand of soap")