SYNONYM
ADJECTIVES
1613 — SYNONYMAL synonymous → obs.
1645 — SYNONYMICAL having the character of a synonym → obs.
1806 — SYNONYMICAL consisting of synonyms
1816 — SYNONYMIC consisting of synonyms
ADVERBS
1599 — SYNONYMICALLY as a synonym
1641 — SYNONYMALLY synonymously → obs.
NOUNS
1592 — SYNONYMY the use of synonyms or of words as synonyms
1609 — SYNONYMY a synonym → obs.
1662 — SYNONYMAL a synonym → obs.
1839 — DUPLICATE a synonym; a word which is in sense exactly the same as another
1857 — SYNONYMICS the study of synonyms
1858 — POLYONYM each of a number of different words having the same meaning; a synonym
1880 — SYNONYMITY a being synonymous or having the same meaning
1889 — POECILONYM a synonym; one of various names for the same thing; a different name for the same thing
NOUNS, PERSON
1753 — SYNONYMIST a person who studies or makes a list of synonyms
VERBS
1614 — SYNONYMIZE to give the synonyms of
1700 — SYNONYMIZE to use synonyms; to express the same meaning by different words
1805 — SYNONYMIZE to furnish with lists of synonyms
Lexicophilia 