Synonyms and related words :
going strong, in full force, in full swing, unallayed, unbated, undiminished, unexhausted, unextinguished, unfaded, unflagging, unmitigated, unquelled, unquenched, unreduced, unrestricted, unretarded, unshaken, unsoftened, unsubdued, untempered, unweakened, unweakening, unwithered, unworn