1) Less crowded 2) Less dense 3) Less populated 4) Less settled 5) Less thick 6) More meager 7) More spread out 8) More thinly distributed 9) More thinly scattered 10) Not as close together 11) Not as thick 12) Not so dense 13) Scantier 14) Thinner Found on https://www.crosswordclues.com/clue/sparser
1) Less crowded 2) Less dense 3) Less populated 4) Less settled 5) Less thick 6) More meager 7) More spread out 8) More thinly distributed 9) More thinly scattered 10) Not as close together 11) Not as thick 12) Not so dense 13) Scantier 14) Thinner