As adjectives the difference between perky and chirpy

is that perky is lively or enthusiastic while chirpy is in a good mood; happy and energetic.

As a noun chirpy is

an electronic device which uses a piezoelectric transducer to make chirping noise, often designed to be hidden and function as an annoyance.

As verbs the difference between grunted and murmured

is that grunted is (grunt) while murmured is (murmur).

As nouns the difference between agouti and coypu

is that agouti is a rodent similar in appearance to a guinea pig but having longer legs while coypu is a large, crepuscular, semiaquatic rodent (Myocastor coypus) resembling a large rat, having bright orange-yellow incisors, native to South America and introduced to Europe, Asia and North America, valued for its fur in eastern Europe and central Asia and considered a pest elsewhere.

As nouns the difference between agouti and koypu

is that agouti is a rodent similar in appearance to a guinea pig but having longer legs while koypu is coypu, nutria.

As a noun motoneuron is

a motor neuron.

As a noun divinity

is the property of being divine, of being like a god or God.

As an adjective sacred is

set apart by solemn religious ceremony; especially, in a good sense, made holy; set apart to religious use; consecrated; not profane or common; as, a sacred place; a sacred day; sacred service.

As a verb sacred is

past tense of sacre.

As a noun depth is

the vertical distance below a surface; the degree to which something is deep.

As verbs the difference between nurture and nurturing

is that nurture is to nourish or nurse while nurturing is present participle of lang=en.

As a noun nurture

is the act of nourishing or nursing; tender care; education; training.

Prosterity is likely misspelled.

Prosterity has no English definition.

As a noun prosperity is

the condition of being prosperous, of having good fortune.

Elodeid is a hyponym of isoetid.

In botany terms the difference between isoetid and elodeid

is that isoetid is a rosette plant that completes its entire life cycle submerged while elodeid is a stem plant that completes its entire life cycle submerged, or with only its flowers above the waterline.