As an adjective gassier
is (gassy).
As a verb grassier is
to pronounce a uvular r.
gassier
English
Adjective
(head)
(gassy)
Anagrams
*
gassy
English
Adjective
(er)
Of a beverage, containing dissolved gas (usually carbon dioxide).
Flatulent.
Synonyms
* (of a beverage, containing gas ): fizzy
grassier
English
Adjective
(head)
(grassy)
grassy
English
Adjective
(er)
Covered with grass.
Resembling grass.