Is “Rank” a Scrabble word?
Yes
RANK
Valid in at least one Scrabble dictionary
Valid in these dictionaries
SOWPODS / CSW
Scrabble UK & International
TWL / NWL
Scrabble North America
Large English Dictionary
General English word list
Meaning of Rank
/ɹæŋk/
adjective
1.Strong of its kind or in character; unmitigated; virulent; thorough; utter (used of negative things).
“rank nonsense”
2.Strong in growth; growing with vigour or rapidity, hence, coarse or gross.
“rank grass”
3.Suffering from overgrowth or hypertrophy; plethoric.
Synonyms: complete, utter, pong, smelly, stinky
adverb
1.Quickly, eagerly, impetuously.