As nouns the difference between graph and hydrograph

is that graph is graph or graph can be a symbol as the smallest unit in a text which has not yet been classified as a grapheme while hydrograph is a graph of flow past a point in a river versus time.

As nouns the difference between flow and hydrograph

is that flow is a movement in people or things with a particular way in large numbers or amounts while hydrograph is a graph of flow past a point in a river versus time.

As a verb flow

is to move as a fluid from one position to another.

As a proper noun river

is .

As a noun hydrograph is

a graph of flow past a point in a river versus time.

As nouns the difference between time and hydrograph

is that time is while hydrograph is a graph of flow past a point in a river versus time.

As a proper noun makira

is an island in solomon islands.

As a noun pio is

(aviation) pilot-induced oscillation.

Ulawa is likely misspelled.

Ulawa has no English definition.

As a proper noun Pio is

an island in Makira-Ulawa province, Solomon Islands.

As a noun PIO is

pilot-induced oscillation.

As a noun chlorophyll

is chlorophyll (green pigment).

As an adjective chlorophyllic is

(biochemistry) of, pertaining to, resembling or derived from chlorophyll.

As a noun chromosphere

is chromosphere.

As an adjective chromospheric is

of or pertaining to the chromosphere.

As a noun heliosphere

is heliosphere.

As an adjective heliospheric is

of or pertaining to the heliosphere.

Xp is a hyponym of pp.

As initialisms the difference between pp and xp

is that pp is polypropylene while XP is initialism of eXtreme Programming|lang=en.

As abbreviations the difference between pp and xp

is that pp is pages while XP is "X Phrase": a phrase which consists of either: (1) an optional specifier and an X-bar phrase, or (2) a conjunction sandwiched between two other XPs. The X is a "pro-letter" which can be substituted by letters such as N for noun, V for verb, P for preposition, I for inflectional, etc.