(a.) Reiterating.

answering antiphonal apish battological booming confutative conjugate delineatory depictive derivative duplicative echoing embodying emulative etymologic figurative graphic growling ideographic illustrational illustrative imitative incarnating iterative lexical lexicographic lexicologic lexigraphic limning lingering mimetic mimic mimish onomastic onomatologic onomatopoeic onomatopoetic paronymic paronymous parrotlike persistent personifying pictographic pictorial portraying reboant rebounding recapitulative redundant reduplicative reechoing refutative reiterant reiterative rejoining repeating repercussive repetitional repetitionary repetitious repetitive replying representational representative representing resounding respondent responding responsive returning reverberant reverberating reverberatory rumbling simulative sounding symbolizing tautological tautologous thundering typifying undamped vivid