headwaters

As a noun headwaters

is the source of a river, the set of streams that feed into the river's beginning.

As a letter x is

the twenty-fourth letter of the.

As a symbol x is

voiceless velar fricative.

As nouns the difference between tailwaters and headwaters

is that tailwaters is plural of lang=en while headwaters is the source of a river, the set of streams that feed into the river's beginning.

As a noun headwaters is

the source of a river, the set of streams that feed into the river's beginning.

As nouns the difference between headwaiters and headwaters

is that headwaiters is while headwaters is the source of a river, the set of streams that feed into the river's beginning.