Strauss
letters
embarks
QUININA
Girded, kidded
antelope
iguana
The word with the 3rd, 4th, 6th, and 7th letters being the same is "bookkeeper."
battledbottledclothedcustardcontendfrettedleotardmottledmustardnettledpretendrattledsettled
letters
avoidingdecidinghomicideignitioninfinitevicinitystrivingreligionprairiesspoilingpacifistmusicianmagicianvomitinguprisingretiringpoliticsoptimizenativityinvitingdividingcivilizeactivitymobilitypoliciesvalidityvisitingumpiringtrainingsolidifyrevisionpositionnotifiedhumiditybikini
The word "Baroque" fits these characteristics.
embarks
embarks
crampon
Toucan is the word.
millennia
hUmanS :D simple!!