As nouns the difference between simpler and simplicity

is that simpler is (archaic) one who grows or gathers simples (medicinal herbs) while simplicity is the quality or state of being simple, unmixed, or uncompounded; as, the simplicity of metals or of earths.

As an adjective simpler

is (simple) less complicated or challenging.

As adjectives the difference between sustained and sustentative

is that sustained is held continuously at a certain level while sustentative is adapted to sustain, strengthen, or corroborate.

As a verb sustained

is (sustain).

As adjectives the difference between curious and concerned

is that curious is (lb) fastidious, particular; demanding a high standard of excellence, difficult to satisfy while concerned is showing concern.

As a verb concerned is

(concern).

As a symbol rub

is russian rouble.

As a noun nosh is

food; a light meal or snack.

As a verb nosh is

to eat a snack or light meal.

As verbs the difference between invested and speculated

is that invested is (invest) while speculated is (speculate).

As nouns the difference between portions and shares

is that portions is while shares is .

As a verb shares is

(share).

As nouns the difference between sunflower and sunflowers

is that sunflower is any plant of the genus helianthus , so called probably from the form and color of its floral head, having the form of a large disk surrounded by yellow ray flowers while sunflowers is .

As adjectives the difference between formal and professional

is that formal is being in accord with established forms while professional is of, pertaining to, or in accordance with the (usually high) standards of a profession.

As nouns the difference between formal and professional

is that formal is formalin while professional is a person who belongs to a profession.

As nouns the difference between orchid and orchids

is that orchid is a plant of the orchid family, bearing unusually-shaped flowers of beautiful colours while orchids is .

As an adjective orchid

is (colour) having a light purple colour.

As verbs the difference between predict and broadcast

is that predict is to make a prediction: to forecast, foretell, or estimate a future event on the basis of knowledge and reasoning; to prophesy a future event on the basis of mystical knowledge or power while broadcast is to transmit a message or signal via radio waves or electronic means.

As nouns the difference between predict and broadcast

is that predict is a prediction while broadcast is a transmission of a radio or television programme aired to be received by anyone with a receiver.

As an adjective broadcast is

(omnidirectionally)cast or scattered widely, in all directions.